Machine Ensat® installation - Precision Fasteners Inc.

Fasteners 

for metals, plastics, 

wood and thin 

sheet metal 

a KerbKonus company 

Technical publication 

No.E12 

Ensat® 

Anchor® 

Clifa® 

... technologies for a reliable hold 

Mubux® 

B-Lok® 

S-Lok®

2 

Dimensions 

Threaded inserts from KerbKonus ... 

Index Page 2 

Tested quality Page 3 

Ensat – the self-tapping Page 4 

threaded insert; installation and 5 

Ensat ® -S 302 and Ensat®-SD 303 

M2 to M30 Self-tapping with very high Page 6 

2-56 to 1“ cutting slot 

or 

M2 to M10 As above, but in a very high Page 9 

special thin-walled 

version 

Ensat ® -SB 307/308 and Ensat®-SBD 347/348 

4-40 to 5/8-11 Self-tapping with very high Page 7 

or three cutting bores 

M3 to M10 As above, but in a very high Page 9 

4-40 to 3/8-16 special thin-walled 

version 

Ensat ® -SBS 337/338 and Ensat®-SBT 357/358 


4-40 to 5/8-11 three cutting bores 

as chip reservoirs 

Blind version additionally 

with closed floor 

Ensat ® -SI 302 2 and Ensat®-SBI 307 2/308 2 


8-32 to 7/16-14 cutting slot or with 

3 cutting bores and 

hexagonal socket 

Ensat installation… 

Manual and machine installation Page 11 

Screw-in tools… 

Tools 620/621/610/610 2 Page 12 

Ensat ® -SH 309 and Ensat®-SHI 309 2 

M2,5 to M16 Self-tapping or Page 13 

2-56 to 5/8-11 thread forming or 

hexagonal socket 

T-Lok 846 0/846 1 

M2,5 to M8 For embedding using high Page 15 

4-40 to 5/16-18 ultrasonic or heat 

transmission 

Mubux ® -A 

Product features 

Torque strength 

Other details 

M2 to M10 Press-in insert with Page 15 

2-56 to 3/8-16 helically knurled and 16 

also as threaded locking profile 

pin 

Dimensions 

B-Lok ® 

M2 to M8 Expansion insert with medium Page 17 

2-56 to 5/16-18 screw locking effect and 18 

S-Lok ® 

M2 to M10 For embedding using high Page 19 

2-56 to 5/16-18 ultrasound or mold in to 21 

also as threaded 

pin 

Anchor ® installation 

Tools Page 22 

Anchor ® rivet bushing 

M2 to M16 Standard version high Page 23 

2-56 to 5/8-11 

Anchor ® -Mini 

M2 to M8 Weight and space- medium Page 24 

2-56 to 5/16-18 saving 

Clifa ® -Press-in nut and stud 

Product features and installation instructions Page 25 

Clifa ® -M 

M2 to M10 for metal high Page 26 

2-56 to 3/8-16 

Clifa ® -P 

M3 to M6 for metal high Page 27 

2-56 to 1/4-20 

Clifa ® -ABO 

M3 to M5 Press-in standoffs high Page 28 

4-40 to 10-24 thru-hole thread 

hexagon head 

Clifa ® -ABG 

M3 to M5 Press-in standoffs high Page 29 

4-40 to 10-24 blind thread 

hexagon head 

Clifa ® -SP/-SR/-SPD 

M2,5 to M8 for pressing-in flush medium Page 30 

3-48 to 5/16-18 to the surface. 

SP coarse teeth 

SR fine teeth 

SPD thin metal 

Clifa ® -SA/SAD 


Torque strength 

Other details 

M3 to M10 for high loads drilled high Page 31 

4-40 to 3/8-16

DEKRA Certification 

zertifiziert 

What really counts: 

tested quality. 

Quality System 

Dekra Certificate in accordance with 

ISO 9001:2008 Reg.No. 30507428/1 

ISO/TS 16949:2009 Reg.No. 160507011/1 

ISO 14001:2004 Reg.No. 170507049/1 

At our parent plant in Amberg, we 

produce threaded inserts using efficient 

production methods. A team of qualified 

and highly motivated staff guarantees a 

consistent, high standard of production. 

The number of products manufactured 

over the company’s history reaches into 

the billions. State-of- the- art automation 

lines manufacture around the clock in a 

precise and high standard of quality. 

The efficient and low-cost production of 

large-scale product series is one of the 

strenghts on which we have based our 

success. 

But our high-volume production output in 

no way compromises flexibility. We are 

able to quickly and efficiently produce 

even small batches of nonstandard items. 

Our state of the art stock control system 

permits the reliable, prompt delivery 

of standard products, keeping your production 

running to schedule at all times 

and helping to minimize your ware - 

housing costs. 

We are particularly proud of a cost-toperformance 

ratio which ensures satisfied 

customers the world over. This has made 

KerbKonus a reputable and respected 

partner to industry in the global marketplace. 

Quality and environment are top priority 

issues at KerbKonus. Quality consciousness 

is a continuous thread running 

through every aspect of the company’s 

work and all its products and services. 

Quality is lived and breathed at Kerb - 

Konus. 

As manufacturer in the metal processing 

industry we are aware of our responsibility 

for an environmentally compatible 

production. With this in mind we follow 

up a policy of sensible resource spending 

and environmental friendly production 

both in our process engineering and our 

product range. 


3

4 

The Ensat® 

self-tapping threaded 

insert … 

Ensat is a self-tapping threaded 

insert with external and internal 

threads, cutting slots or cutting bores. 

A continuous process of further 

development has brought about a number 

of major improvements to product 

characteristics. These inserts are 

protected by German and also foreign 

patents. 

Ensat®-S 302 

(with cutting slot) is recommended for 

most application cases. In certain materials, 

this Ensat demonstates a minimal 

inward springing action, so creating a 

certain screw locking effect. If this effect 

is not required, we recommend using 

Ensat-SB 307/308. 

Ensat®-SB 307/308 

(with cutting bores) was developed for 

materials with difficult cutting properties. 

This insert has a thick wall and the 

cutting force is distributed over three 

cutting edges. 

The short version Ensat 307 is particularly 

suitable where minimal material 

thicknesses are involved. 

Thin-walled Ensat®-SD/SBD 

for applications involving special space 

conditions (residual wall thicknesses), 

and also suitable for driving using a 

thread tapping machine (same internal 

and external thread pitch). 

Slot version: Works Standard 303 Threehole 

version: Works Standard 347/348 

(see page 9). 

Ensat®-SBS 337/338 

with three chip reservoirs. Used 

primarily wherever only a small amount 

of chips may be permitted to occur during 

the tapping process (see page 8). 

Ensat®-SBT 

with closed floor for additional 

sealing from below. Works Standard 

357/358. Dimensions: see Works Standard 

337/338 (see page 8). 

Ensat®-3F 305 is a thread forming insert 

with 3 longitudinal grooves around 

ist periphery. 

Fields of application 

The Ensat is used throughout the entire 

metal and plastics processing industry. 

Automotive industry, passenger 

and commercial vehicles 

Engines, transmissions, wide range of 

supply parts such as side view mirrors, 

radiators, bumpers etc. 

Plant and equipment construction 

Flange joints, construction equipment, 

oil burners etc. 

Household appliance and office 

machinery production 

Vacuum cleaners, cameras, sun lamps, 

drills etc. 

Electrical and laboratory supplies 

Capacitors, heavy current, radio and 

telecommunication systems, dental 

technology equipment. 

Military applications 

Tanks, aircraft etc. 

3 chip reservoirs 

around the periphery 

Ensat®-SBS 337/338 

These cutting bores are shaped to serve 

as chip reservoirs. The chips created during 

the diving process are stored here 

and cannot drop into sensitive equipment 

parts. For additional sealing from 

below: Ensat with closed floor: Works 

Standard 357/358 Dimensions: See 

Works Standard 307/308 (see page 7). 


The Ensat has a large effective shearing 

surface (E B), so ensuring a 

higher degree of pull-out strength, 

i.e. an Ensat M4 is often sufficient 

instead of a cut M5 thread. 

The Ensat is driven subsequently into 

the finished workpiece. This means a 

higher casting machine output, no 

rejects due to incorrectly cast-in insert 

components, no molding sand 

trapped in the thread. 

A pre-cast or pre-drilled retaining 

hole with normal tolerance requirements 

is sufficient for driving in the 

Ensat. The thread is always precisely 

positioned. 

The work steps required with wire 

inserts – thread tapping, breaking 

off trunnions etc. as well as costly 

wearing tools (special thread drills, 

limit plug gauges etc.) are not 

required with the Ensat-system. 

The Ensat is insensitive to small 

areas of shrinkage. The Ensat-system 

prevents damage caused by torn 

threads. 

Universal application for all types of 

plastic, thermoset plastics, thermoplastics, 

PU/PUR foam, fiberglass 

reinforced plastics, for hardwood and 

plywood, particle board and metal. 

Maximum strength values in comparison 

to other systems. The diagram 

illustrates the withdrawing force in 

thermoplastic materials: In thermoset 

plastics and glass fiber reinforced 

plastics, the values tend to be higher.

The Ensat® 

in the workpiece ... 

Installation recommendation 

The Ensat should be processed approx. 

0.004 – 0.008 recessed. After pro - 

cessing, the Ensat can be immediately 

subjected to load. If the component 

material permits subsidence of the 

Ensat under load, the Ensat can only 

execute an axial movement of 0.004 to 

0.008. In other words, the pretension of 

the screw union is largely retained, 

loosening of the screw connection 

under dynamic load is impeded. 

Retaining hole 

The retaining hole can be simply drilled 

or already provided for in the casting. 

It is generally not necessary to countersink 

the hole. However, we do recommend 

that you take care not to warp 

the workpiece surface when screwing in 

the Ensat. 

Material thickness: 

Length of the Ensat = smallest 

admissible material thickness M. 

Depth of the blind hole: 

Minimum depth -T see Works Standard 

sheets, page 6 to 13. 

Guidline values for light alloys: 

W ≥ 0.004 to 0.024 E 

Guidline values for cast iron: 

W ≥ 0.012 to 0.02 E 

Guidline values for plastic: 

W ≥ 0.01 to 0.035 E 

E = Outside diameter of the 

Ensat [mm] 

Borehole diameter: 

Brittle, tough and hard materials call for 

a larger borehole than soft or elastic 

materials. For guideline values, see the 

table above. 

Edge distance: 

The smallest still admissible edge 

distance depends on the planned stress 

level and the elasticity of the material 

into which the Ensat is installed. 

Sinking the receiving hole 

For a clean fit of the Ensat flush with 

the surface, the following injection or 

pressed hole form is recommended: 

Chamfer soft to medium-hard plastics 

to 60°. For hard and brittle plastics: Preinject 

or pre-press with N = E + 0.008 

to 0.016. Sinking depth X ≥ pitch of the 

Ensat male thread. 

In molded parts made of glass fiber 

reinforced plastic, a high pull-out resistance 

is reached if the casting skin is 

removed in the receiving hole by drilling 

open. 

Avoid any tilting between the Ensat and 

the screw – under the head or in the 

thread. For this reason, in the case of 

adjusting screws the Ensat is driven in 

to a depth of ≥ 0.004. Studs must be 

fixed against the floor surface of the 

blind hole. 


Example: 

Female thread 5/16-18, recommended 

Borehole diameter for: 

Light alloy workpiece (Rm=280N/mm²), 

Ensat®-S 302: 0.441 to 0.449 

Ensat®-SB 307/308: 0.441 to 0.445 

Plastic workpiece 

Ensat®-S 302: 0.429 to 0.441 

Ensat®-SB 307/308: 0.437 to 0.445 

In case of processing problems (e.g. 

extreme screw-in torque levels), it is 

generally of no consequence to choose 

a higher bore diameter. In case of 

doubt, it is worth testing this. For more 

information also please see technical 

publication 20 inserts for metal; or 

technical publication 30 inserts for 

plastic and wood. 

5

Application 

Threaded insert Ensat-S with 

cutting slot is a self-tapping 

fastener, vibration resistant 

screw joints with high loading 

capacity in materials with low 

shearing strength. 

Threaded insert 

– self-tapping – 

for use in: plastics, light metal alloys, hardwood 

Example for finding Self-tapping threaded insert Ensat-S to Works Standard series 302 with internal thread A = 10-24 

the article number made of case-hardened, zinc plated and yellow chromated, steel: Ensat-S 302 000 610. 160 

6 Precision Fasteners Inc. 24 WORLD’s FAIR DRIVE, UNIT D SOMERSET, NJ 08873 (800) 447-2077 FAX (732) 627-8424 

Ensat ® -S 

Works Standard 

302 

Materials Unhardened steel Article no. (fourth group of digits) … … … 100 

Case-hardened steel, zinc plated, clear chromated Article no. (fourth group of digits) … … … 110 

Case-hardened steel, zinc/nickel plated, transparent passivated Article no. (fourth group of digits) … … … 143 

Case-hardened steel, zinc plated, yellow chromated Article no. (fourth group of digits) … … … 160 

Stainless steel 1.4105 Article no. (fourth group of digits) … … … 400 

Stainless steel 1.4305 (AISI 303) Article no. (fourth group of digits) … … … 500 

Brass Article no. (fourth group of digits) … … … 800 

Other materials, designs and finishes on request 

Tolerances ISO 2768-m 

It is suitable for installation in 

the following materials: 

– Plastic, laminates 

– Hardwood, but also 

– Light alloys 

– Cast iron, brass, bronze 

NF metals 

All dimensions in inches unless otherwise noted 

Internal Article Internal Article External thread Length Guidline values for receiving Minimum 

thread no. thread no. hole dia. drill hole 

Inch metric depth in 

sizes sizes case of 

Plastics Soft metals blind holes 

A A E P B L L T 

2-56 302 000 602 … M 2.5 302 000 025 … 4.5 mm 0.5 mm 0.236 0.161 to 0.165 0.165 to 0.169 0.315 

4-40 302 000 604 … M 3 302 000 030 … 5 mm 0.5 mm 0.236 0.181 to 0.185 0.185 to 0.189 0.315 

6-32 302 000 606 … M 3.5 302 000 035 … 6 mm 0.75 mm 0.315 0.217 to 0.22 0.22 to 0.224 0.394 

8-32 302 000 608 … M 4 302 000 040 … 6.5 mm 0.75 mm 0.315 0.236 to 0.24 0.24 to 0.244 0.394 

10-24 302 000 610 … M 5 302 000 050 … 8 mm 1 mm 0.393 0.287 to 0.295 0.295 to 0.299 0.512 

M 6 (a) 302 000 061 … 9 mm 1 mm 0.472 0.327 to 0.35 0.335 to 0.339 0.59 

1/4-20 302 000 625 … M 6 302 000 060 … 10 mm 1.5 mm 0.551 0.35 to 0.362 0.362 to 0.37 0.669 

5/16-18 302 000 631 … M 8 302 000 080 … 12 mm 1.5 mm 0.59 0.429 to 0.441 0.441 to 0.449 0.709 

3/8-16 302 000 637 … M 10 302 000 100 … 14 mm 1.5 mm 0.709 0.508 to 0.52 0.52 to 0.528 0.866 

7/16-14 302 000 644 … M 12 302 000 120 … 16 mm 1.5 mm 0.866 0.587 to 0.598 0.598 to 0.606 1.024 

1/2-13 302 000 650 … M 14 302 000 140 … 18 mm 1.5 mm 0.945 0.665 to 0.677 0.677 to 0.685 1.102 

5/8-11 302 000 662 … M 16 302 000 160 … 20 mm 1.5 mm 0.866 0.744 to 0.756 0.756 to 0.764 1.063 

M 18 302 000 180 … 22 mm 1.5 mm 0.945 0.823 to 0.835 0.835 to 0.843 1.142 

M 20 302 000 200 … 26 mm 1.5 mm 1.063 0.98 to 0.992 0.992 to 1 1.26 

3/4-10 302 000 675 … M 22 302 000 220 … 26 mm 1.5 mm 1.181 0.98 to 0.992 0.992 to 1 1.417 

M 24 302 000 240 … 30 mm 1.5 mm 1.181 1.138 to 1.15 1.15 to 1.157 1.417 

1"-8 302 000 600 … M 27 302 000 270 … 34 mm 1.5 mm 1.181 1.295 to 1.307 1.374 to 1.386 1.417 

M 30 302 000 300 … 36 mm 1.5 mm 1.575 1.307 to 1.315 1.386 to 1.394 1.811 

Thread Internal thread A: UNC/UNF as per class 2B 

metric as per ISO 6H 

External thread E: metric, tolerances in accordance with Works Standard 

Internal thread A: also avaiable as Unified National Fine (UNF) 

Remark 2-56 UNC/M2.5 only for materials with minimal strength, as the shearing resistance of the studs in the 

installation tools may be insufficient.

Application 

Threaded insert Ensat-SB with 

cutting bores is a self-tapping, 

fastener for the creation of 

wearfree, vibration high loading 

capacity in materials with higher 

shearing strength. 


– self-tapping – 

for use in: aluminium, aluminium alloy, magnesium, mild steel 


Precision Fasteners Inc. 24 WORLD’s FAIR DRIVE, UNIT D SOMERSET, NJ 08873 (800) 447-2077 FAX (732) 627-8424 

Ensat ® -SB 


307 and 308 


Example for finding Self-tapping threaded insert Ensat-SB to Works Standard series 307 with internal thread A = 10-24 

the article number made of case-hardened, zinc plated and yellow chromated, steel: Ensat-SB 307 000 610. 160 

Short design Works Standard 307 

Long design Works Standard 308 












– Duroplastics, thermoplastics plastics (with the 

execption of rubbersoft plastics < 100 Shore A) 

but also for 

– Aluminium and aluminium alloys 

– Magnesium alloys 

– Cast iron 


thread no. thread no. Special thread hole dia. drill hole 

Inch metric depth in 

sizes sizes case of 

Plastics Soft metals blind holes 

A A E P B L L T 

4-40 

307 000 604 … 

308 000 604 … 

M 3 

307 000 030 … 

308 000 030 … 

5 mm 

5 mm 

0.6 mm 

0.6 mm 

0.157 

0.236 

0.181 to 0.185 0.185 

0.236 

0.315 

6-32 

307 000 606 … 

308 000 606 … 

M 3.5 

307 000 035 … 

308 000 035 … 

6 mm 

6 mm 

0.8 mm 

0.8 mm 

0.197 

0.315 

0.217 to 0.22 0.22 

0.276 

0.394 

8-32 

307 000 608 … 

308 000 608 … 

M 4 

307 000 040 … 

308 000 040 … 

6.5 mm 

6.5 mm 

0.75 mm 

0.75 mm 

0.236 

0.315 

0.236 to 0.24 0.24 

0.315 

0.394 

10-24 

307 000 610 … 

308 000 610 … 

M 5 

307 000 050 … 

308 000 050 … 

8 mm 

8 mm 

1 mm 

1 mm 

0.276 

0.394 

0.291 to 0.299 0.295 to 0.299 

0.354 

0.512 

1/4-20 

307 000 625 … 

308 000 625 … 

M 6 

307 000 060 … 

308 000 060 … 

10 mm 

10 mm 

1.25 mm 

1.25 mm 

0.315 

0.472 

0.366 to 0.374 0.37 to 0.374 

0.934 

0.591 

5/16-18 307 000 631 … 308 000 631 … 

M 8 

307 000 080 … 

308 000 080 … 

12 mm 

12 mm 

1.5 mm 

1.5 mm 

0.354 

0.551 

0.437 to 0.445 0.441 to 0.445 

0.433 

0.669 

3/8-16 

307 000 637 … 

308 000 637 … 

M 10 

307 000 100 … 

308 000 100 … 

14 mm 

14 mm 

1.5 mm 

1.5 mm 

0.394 

0.709 

0.515 to 0.524 0.52 to 0.524 

0.512 

0.866 

7/16-14 307 000 644 … 308 000 644 … 

M 12 

307 000 120 … 

308 000 120 … 

16 mm 

16 mm 

1.75 mm 

1.75 mm 

0.472 

0.866 

0.591 to 0.598 0.594 to 0.598 

0.591 

1.024 

1/2-13 

307 000 650 … 

308 000 650 … 

M 14 

307 000 140 … 

308 000 140 … 

18 mm 

18 mm 

2 mm 

2 mm 

0.551 

0.945 

0.669 to 0.677 0.673 to 0.677 

0.669 

1.102 

5/8-11 

307 000 662 … 

308 000 662 … 

M 16 

307 000 160 … 

308 000 160 … 

20 mm 

20 mm 

2 mm 

2 mm 

0.551 

0.945 

0.748 to 0.756 0.752 to 0.756 

0.669 

1.102 



External thread E: Special thread with flattened thread root, tolerances, 

tolerances in accordance with Works Standard 

Special applications For chip-sensitive (e.g. electronic appliances): Also available with 3 closed cutting bores serving 

as chip reservoirs. Works Standard 337/338 – see page 8 

7

Application 

This special Ensat was developed 

primarily for applications in 

which chips – created by the 

self-tapping process – exert a 

detrimental effect and could 

cause serious damage or failure 

Example for finding Self-tapping threaded insert Ensat-SBS to Works Standard series 337 with internal thread A = 10-24 

the article number made of case-hardened, zinc plated and yellow chromated, steel: Ensat-SBS 337 000 610. 160 













– self-tapping with chip reservoirs – 

during subsequent operation of 

the installed assembly – for 

example in electronic equipment. 

The three cutting bores 

distributed around the periphery 

are formed as chip reservoirs. 

The chips created during the 

installation process are stored in 

these reservoirs and cannot drop 

into the sensitive equipment 

components. 



thread no. thread no. Special thread hole dia. drill hole depth 

Inch metric in case of 

sizes sizes blind holes 

A A E P B L +0.004 T 

4-40 

307 000 604 … 

308 000 604 … 

M 3 

307 000 030 … 

308 000 030 … 

5 mm 

5 mm 

0.6 mm 

0.6 mm 

0.157 

0.236 

0.185 

0.236 

0.315 

6-32 

307 000 606 … 

308 000 606 … 

M 3.5 

307 000 035 … 

308 000 035 … 

6 mm 

6 mm 

0.8 mm 

0.8 mm 

0.197 

0.315 

0.22 

0.276 

0.394 

8-32 

307 000 608 … 

308 000 608 … 

M 4 

307 000 040 … 

308 000 040 … 

6.5 mm 

6.5 mm 

0.75 mm 

0.75 mm 

0.236 

0.315 

0.24 

0.315 

0.394 

10-24 

307 000 610 … 

308 000 610 … 

M 5 

307 000 050 … 

308 000 050 … 

8 mm 

8 mm 

1 mm 

1 mm 

0.276 

0.394 

0.3 

0.354 

0.512 

1/4-20 

307 000 625 … 

308 000 625 … 

M 6 

307 000 060 … 

308 000 060 … 

10 mm 

10 mm 

1.25 mm 

1.25 mm 

0.315 

0.472 

0.374 

0.934 

0.591 

5/16-18 307 000 631 … 308 000 631 … 

M 8 

307 000 080 … 

308 000 080 … 

12 mm 

12 mm 

1.5 mm 

1.5 mm 

0.354 

0.551 

0.449 

0.433 

0.669 

3/8-16 

307 000 637 … 

308 000 637 … 

M 10 

307 000 100 … 

308 000 100 … 

14 mm 

14 mm 

1.5 mm 

1.5 mm 

0.394 

0.709 

0.528 

0.512 

0.866 

7/16-14 307 000 644 … 308 000 644 … 

M 12 

307 000 120 … 

308 000 120 … 

16 mm 

16 mm 

1.75 mm 

1.75 mm 

0.472 

0.866 

0.602 

0.591 

1.024 

1/2-13 

307 000 650 … 

308 000 650 … 

M 14 

307 000 140 … 

308 000 140 … 

18 mm 

18 mm 

2 mm 

2 mm 

0.551 

0.945 

0.681 

0.669 

1.102 

5/8-11 

307 000 662 … 

308 000 662 … 

M 16 

307 000 160 … 

308 000 160 … 

20 mm 

20 mm 

2 mm 

2 mm 

0.551 

0.945 

0.76 

0.669 

1.102 



External thread E: Special thread with flattened thread root, tolerances, 

tolerances in accordance with Works Standard 

Special applications For closed and sealed applications with chip reservoirs and closed floor (blind thread version from 8-32); 

Works Standard 357/358. Or with head available from 10-24: Ensat-SBSK, Works Standard 337 1 / 338 1. 


Ensat ® -SBS 


337 and 338

Application 

Threaded insert Ensat-SD with 

cutting slot in a special, thinwalled 

and shortened version. 

Particularly suitable for plastic 

with thin residual walls and for 

light-weight constructions. 

Application 

Threaded insert Ensat-SBD with 

three cutting bores in a special, 

thin-walled and shortened version. 

Particularly suitable for plastic with 

thin residual walls and for lightweight 

constructions. 

Thin-walled threaded insert 

– self-tapping, cutting slot – 

These versions are designed 

primarily for processing on thread 

tapping machines, as the pitch of 

the outside and internal thread 

are identical. 

Thin-walled threaded insert 

– self-tapping, cutting bore – 

These versions are designed 

primarily for processing on thread 

tapping machines, as the pitch of 

the outside and internal thread 

are identical. For processing thinwalled 

inserts in metals, the tensile 

strength / hardness of the base 

material is the determining factor. 

In critical cases, lubrication using 

suitable means is recommended in 

order to prevent breakage of the 

thin-walled inserts. 



Ensat ® -SD 


303 

Internal Article External thread Length Guidline values for receiving Minimum drill hole 

thread no. hole dia. depth in case of 

metric blind hole 

sizes Soft plastics, Hard, brittle 

hardwood plastics 

A E P B L L T 

M 3 303 000 030 … 4.5 mm 0.5 mm 0.236 0.157 to 0.161 0.161 to 0.165 0.315 

M 3.5 303 000 035 … 5 mm 0.6 mm 0.236 0.177 to 0.181 0.181 to 0.185 0.315 

M 4 303 000 040 … 6 mm 0.7 mm 0.236 0.209 to 0.213 0.217 to 0.22 0.315 

M 5 303 000 050 … 7 mm 0.8 mm 0.315 0.248 to 0.252 0.256 to 0.26 0.394 

M 6 303 000 060 … 8 mm 1 mm 0.394 0.28 to 0.283 0.287 to 0.295 0.512 

M 8 303 000 080 … 10 mm 1.25 mm 0.472 0.339 to 0.346 0.35 to 0.362 0.591 

M10 303 000 100 … 12 mm 1.5 mm 0.591 0.417 to 0.425 0.429 to 0.441 0.709 

Example for finding Self-tapping threaded insert Ensat-SD slot to Works Standard series 303 with internal thread A = M5 

the article number made of case-hardened, zinc plated and yellow chromated, steel: Ensat-SD 303 000 050. 160 

Materials, tolerances, thread see Works Standard 302, page 4; materials … 400 and … 500 on request 

Ensat ® -SBD 


347/348 


Internal Article Internal Article External thread Length Receiving hole dia. Minimum drill hole 

thread no. thread no. Special thread for plastics depth T 

Inch metric (guiding values) (blind holes) 

sizes sizes B 



A A E P 347 348 L B B 

6-32 3.. 000 606 … M 3.5 3.. 000 035 … 5 mm 0.6 mm 0.197 0.315 0.181 to 0.185 0.315 0.394 

8-32 3.. 000 608 … M 4 3.. 000 040 … 6 mm 0.7 mm 0.236 0.315 0.217 to 0.22 0.354 0.512 

10-24 3.. 000 610 … M 5 3.. 000 050 … 7 mm 0.8 mm 0.276 0.394 0.256 to 0.26 0.394 0.591 

1/4-20 3.. 000 625 … M 6 3.. 000 060 … 8 mm 1 mm 0.315 0.472 0.287 to 0.295 0.433 0.669 

5/16-18 3.. 000 631 … M 8 3.. 000 080 … 10 mm 1.25 mm 0.354 0.551 0.35 to 0.362 0.512 0.866 

3/8-16 3.. 000 637 … M 10 3.. 000 100 … 12 mm 1.5 mm 0.394 0.709 0.429 to 0.441 0.591 1.024 



Materials, tolerances, thread see Works Standard 307/308, page 5; materials ... 400 and ... 500 on request 


9

Application 

This threaded insert with hexa- 

gonal socket is a self-tapping 

fastener for the creation of lowwear, 

vibration resistant screw 

joints with high load capacity in 

materials with low shearing 

strength. 

The Ensat is inserted via the 

hexagonal socket, permitting the 

achievement of short installation 

Other benefits: More simple driving 

tools and machines which 

require only clockwise rotation. 


– self-tapping with hexagonal socket – 

When using in plastics, the Ensat 

can be extracted without problems 

before the recycling process, 

resulting in lower costs. 



– Duroplastics, thermoplastics 

(with the exception of rubbersoft 

thermoplastics

Machine Ensat® installation … 

Machine driving process 

1. Precisely position the workpiece to 

ensure that the hole and machine 

spindle are in exact alignment (do 

not tilt). Set the machine to the precise 

driving depth (approx. 0.004 – 

0.008 below the surface of the 

workpiece). 

2. Turn the machine to clockwise rotation. 

At the start of the driving process, 

the rotatable external shell of 

the tool must be resting against the 

external visible stop pins in such a 

way that it is driven by the pins in 

the clockwise direction. 

3. Feed the Ensat towards the tool 

(slot or cutting bores facing 

downwards) and grip for the 

duration of 2 to 4 revolutions. 

4. Actuate the operation lever of the 

machine until the Ensat cuts into 

the borehole. The remainder of the 

driving process takes place without 

actuating the feed. 

5. Switch on the reversing function. 

Always avoid setting the tool down 

hard on the workpiece, as this can 

Manual Ensat® 

installation … 

Manual installation with driving tool and tap wrench: 

Emergency installation using screw and nut: 

lead to breaking both the tool and 

the Ensat. 

Excessively hard contact of the tool 

can damage the play-free fit of the 

Ensat and so reduce the pull-out 

strength. If necessary, the driving 

speed may have to be adapted in 

line with the necessary reversal time. 

Machine installation takes place with 

production tool 620 or 621, integrated 

in a: 

1. Thread tapping machine 

2. Use a drill press fitted with a 

reversing tapping attachment or a 

tapping machine which is not pitch 

controlled. Important: Never exceed 

the maximum admissible driving 

torque. 

3. Special manual machine with bit 

stop and reversing system. 

4. For large-scale series: 

Single or multiple installation 

machines with pneumatic or electric 

drive, semi or fully automatic, CNC. 

Recommended speed values 

for light alloys: 

Ensat® Speed [min-1 Internal thread 

] 

M 2.5 / M 3 650 – 900 

M 4 / M 5 400 – 600 

M 6 / M 8 280 – 400 

M 10 / M 12 200 – 300 

M 14 / M 16 150 – 200 

M 18 / M 20 120 – 200 

M 22 / M 24 100 – 160 

M 27 / M 30 80 – 140 

Torque M 

The maximum admissible torque 

depends on: 

1. The axial load capacity of the tool 

stud 

2. The pressure resistance capacity of 

the Ensat® in the axial direction. 

Lubrication 

Only in the case of materials with difficult 

cutting properties. 

For medium-hard light alloys: 

Cutting oil, spirit or petroleum. 

Manual installation 

Manual driving takes place using the 

driving tools 620, 621 or 610 and a tap 

wrench: 

1. Drill the hole according to the 

technical publication for the correct 

diameter, countersink if necessary. 

2. Screw the Ensat onto the driving 

tool with the cutting slot or cutting 

bore pointing downwards. 

3. Drive in the Ensat until approx. 

0.004 – 0.008 below the surface of 

the workpiece. Ensure that it does 

not tilt! When using tool 620 and 

621, the rotatable shell must rest 

against the externally visible stop 

pins in such a way that it is driven 

round clockwise by the pins. 

4. Back out the driver tool. During this 

process, tool 620 or 621 is automatically 

released from the Ensat. Tool 

610: Hold the hex nut using a spanner 

until the lock breaks. 



Recommended speed values 

for plastic: 

Ensat® Speed [min-1 Internal thread 

] 

M 2.5 / M 3 800 – 1300 

M 4 / M 5 600 – 900 

M 6 / M 8 400 – 700 

M 10 / M 12 300 – 450 

M 14 / M 16 240 – 350 

M 18 / M 20 180 – 300 

M 22 / M 24 160 – 250 

M 27 / M 30 140 – 200 

Maximum admissible 

installation torque 

Ensat® M 2.5 1.5 Nm 

Ensat® M 3 2.5 Nm 

Ensat® M 4 5.5 Nm 

Ensat® M 5 10 Nm 





For tough light alloys and cast 

iron: 

Cutting oil with appr. 5 – 8% molyb - 

denum sulphide. 

Driving into steel 

With Ensat®-S 302: 

Pre-cut the thread using the drill (max. 

center cutter), set the threaded stud of 

the tool to the full Ensat length (tool 

610 cannot be adjusted). 

With Ensat®-SB 307 / 308: 

In steel up to medium strength, precutting 

is not required. 

Up to M12, we recommend the use of 

Mubux®-M for steel. 

Mubux®-M0 installation 

Pre-cut the retaining thread with 

customary thread tapping tool, then 

drive in as for the Ensat. 

11

The correct length of the stud for the 

Ensat with cutting slot/ cutting bore 

results from the pitch of the outside 

thread (see also illustration below; 

P=pitch of the outside thread). 

Set or exchange the stud 

Pull off the shell (2) downwards off 

the shaft (1). 

Release the locking screw (5). 

Screw the stud (7) in or out. Yellow 

color marking indicates the flattened 

surfaces for the locking screws. 

Ensat®– 

driving tools … 

Tool 620 

for flush installation 

Square flat 

Shaft 

Pin 

Ball 

Locking screw 

Colour marking 

Ball bearing 

Shell 

Guide bush 

Stud 

When assembling, tighten both 

screws (5) evenly. 

Insert the ball bearing (6). 

Push on the shell (2) until the ball 

stop locks into place. To ensure that 

the tool functions perfectly, it must 

Tool 621 

for deep 

receiving holes 

be possible to easily totate the shell. 

For short Ensats, grind down tool 

610 accordingly. 

If you wish the Ensat to be driven 

deeper than 0.004 below the 

workpiece surface, screw off the 

guide bush (3) at the front. 

Tool 610 

for manual 

installation 

Dimensions (INCH) 

For Tool 620 Tool 621 Manual assembly tool 6100 For Tool 6102 Machine/Hand 

Ensat Article-no. Square Length Article-no. Article-no. Length Square Collar Ensat-SBI Article-no. Length Square Shank 

SW ~ ~ SW SW ~ SW Ø 

Whitworth UNC UNF E E1 D B B1 E2 B D D B G F 

M2.5 - 620 000 025 - - - 0.709 0.315 0.248 3.071 620 000 025 1.575 0.276 610 000 025 2.165 0.197 0.276 M2.5 - - - - 

M3 No.4 620 000 030 - 620 000 604 620 000 704 0.709 0.315 0.248 3.071 620 000 030 1.575 0.276 610 000 030 2.165 0.197 0.276 M3 - - - - 

M3.5 No.6 620 000 035 - 620 000 606 620 000 706 0.709 0.315 0.248 3.071 620 000 035 1.575 0.276 610 000 035 2.362 0.197 0.276 M3.5 - - - - 

M4 No.8 620 000 040 - 620 000 608 620 000 708 0.709 0.315 0.248 3.071 620 000 040 1.575 0.276 610 000 040 2.362 0.197 0.276 M4 610 200 040 3.15 0.193 0.236 

M5 No.10 620 000 050 - 620 000 610 620 000 710 0.945 0.492 0.394 3.74 620 000 050 1.969 0.354 610 000 050 2.953 0.315 0.512 M5 610 200 050 3.543 0.244 0.315 

M6 1/4'' 620 000 060 620 000 525 620 000 625 620 000 725 0.945 0.492 0.394 3.74 620 000 060 1.969 0.394 610 000 060 2.953 0.315 0.512 M6 610 200 060 3.937 0.315 0.394 

M8 5/16'' 620 000 080 620 000 531 620 000 631 620 000 731 0.945 0.492 0.394 3.74 620 000 080 1.969 0.472 610 000 080 2.953 0.315 0.512 M8 610 200 080 3.937 0.315 0.394 

M10 3/8'' 620 000 100 620 000 637 620 000 637 620 000 737 1.26 0.63 0.492 4.646 620 000 100 2.362 0.591 610 000 100 3.74 0.492 0.748 M10 610 200 100 4.331 0.354 0.472 

M12 7/16'' 620 000 120 620 000 544 620 000 644 620 000 744 1.26 0.63 0.492 4.646 620 000 120 2.362 0.709 610 000 120 3.74 0.492 0.748 M12 - - - - 

M14 1/2'' 620 000 140 620 000 550 620 000 650 620 000 750 1.969 0.984 0.787 5.709 620 000 140 2.362 0.788 610 000 140 3.74 0.492 0.748 M14 - - - - 

M16 5/8'' 620 000 160 620 000 562 620 000 662 620 000 762 1.969 0.984 0.787 5.709 620 000 160 2.362 0.866 - - - - M16 - - - - 

M18 - 620 000 180 - - - 1.969 0.984 0.787 5.709 620 000 180 2.362 0.945 - - - - M18 - - - - 

M20 - 620 000 200 - - - 2.283 0.984 0.787 6.654 620 000 200 2.362 1.024 - - - - M20 - - - - 

M22 - 620 000 220 - - - 2.283 0.984 0.787 6.654 620 000 220 2.362 1.102 M22 - - - - 

M24 - 620 000 240 - - - 2.756 1.181 0.984 7.795 620 000 240 2.362 1.26 - - - - M24 - - - - 

M27 - 620 000 270 - - - 2.756 1.181 0.984 7.795 620 000 270 2.362 1.378 - - - - M27 - - - - 

M30 - 620 000 300 - - - 2.756 1.181 0.984 7.795 620 000 300 2.362 1.496 - - - - M30 - - - - 

Tools 620 and 621 also fit within the colored lines for other dimensions, 

if the guide bush and stud are exchanged 


Square 

flat 

hex nut 

Tool 6102 

for Ensat-SBI 

Diameter: 0.004 to 0.008 smaller 

than the Ensat receiving hole. 

For mounting the thin-walled Ensat 

(Page 11), modified guide bushings 

should be used. 

(available on request)

Application 

Threaded insert Ensat 309 with 

cutting slot is a fastener designed 

to create wear- and vibrationresistant 

screw connections capable 

of withstanding hight loads 

in: 

– Hardwood 

– Softwood 

– Soft plastic and 

Composite materials 


Example for finding Self-tapping threaded insert Ensat-SH to Works Standard series 309 with internal thread A = 10-24 

the article number made of brass: Ensat-SH 309 000 610. 800 






– self-tapping, or thread-forming with hexagonal socket – 

Installation 

1.Self-tapping 

Installation with cutting slot 

facing down (normal application) 

2.Thread forming 

Installation with cutting slot 

facing up (in very soft materials) 

3.With internal hexagon thread 

(M4 to M10) 

For installation information 

please see page 8 



External thread E: Wood thread. Tolerances in accordance with Works Standard 


Ensat ® -SH/SHI 


309 and 309 2 

Internal Article Internal Article External thread Length Hexagonal Guidline values for Minimum 

thread no. thread no. Special thread Socket Receiving hole dia. drill hole 

Inch metric depth 

sizes sizes Softwood Plastic blind 

≥ Hardwood holes 

A A E P B SW +0.1 L L T 

2-56 309 000 602 … M 2.5 309 000 025 … 5 mm 1.6 mm 0.236 - 0.138 0.142 to 0.15 0.315 

4-40 309 000 604 … M 3 309 000 030 … 5.5 mm 1.6 mm 0.236 - 0.161 0.165 to 0.169 0.315 

6-32 309 000 606 … M 3.5 309 000 035 … 6.5 mm 1.6 mm 0.315 - 0.181 0.185 to 0.189 0.394 

8-32 

309 000 608 … 

309 200 608 … 

M 4 

309 000 040 … 

309 200 040 … 

7 mm 2.5 mm 0.394 

- 

3.2 mm 

0.201 0.205 to 0.209 0.512 

10-24 

309 000 610 … 

309 200 610 … 

M 5 

309 000 050 … 

309 200 050 … 

9 mm 3 mm 0.472 

- 

4.1 mm 

0.26 0.264 to 0.272 0.591 

1/4-20 

309 000 625 … 

309 200 625 … 

M 6 

309 000 060 … 

309 200 060 … 

9 mm 3 mm 0.551 

- 

4.9 mm 

0.299 0.303 to 0.311 0.669 

5/16-18 309 000 631 … All dimensions in inches unless otherwise noted 

309 200 631 … 

M 8 

309 000 080 … 

309 200 080 … 

13 mm 4 mm 0.787 

- 

6.6 mm 

0.389 0.398 to 0.406 0.906 

3/8-16 

309 000 637… 

309 200 637… 

M 10 

309 000 100 … 

309 200 100 … 

16 mm 5 mm 0.906 

- 

8.3 mm 

0.488 0.496 to 0.504 1.024 

7/16-14 309 000 644 … M 12 309 000 120 … 19 mm 5 mm 1.024 10.1 mm 0.606 0.614 to 0.622 1.181 

1/2-13 309 000 650 … M 14 309 000 140 … 22 mm 5 mm 1.024 - 0.724 0.732 to 0.74 1.181 

5/8-11 309 000 662 … M 16 309 000 160 … 24 mm 5 mm 1.024 - 0.803 0.811 to 0.819 1.181 

13

Application 

The T-Lok is a threaded insert 

with a helical toothed outside 

profile and guide shoulder for 

easy embedding. It is used to 

produce wear-proof, vibrationproof 

screw connections with 

high loading capacity in thermoplastics. 

The inserts are pressed into 

conical retaining holes with a 

draft angle of appr. 4° and cylindrical 

drilling site with plastification 

of the hole wall by 

means of ultrasound or heating. 

Example for finding Threaded insert T-Lok to Works Standard series 846 0 with internal thread A = 8-32 

the article number made of brass: T-Lok 846 000 608. 800 

Short design Works Standard 846 0 

Long design Works Standard 846 1 

Materials Brass Article no. (fourth group of digits) … … … 800 



Threaded inserts for tapered holes 

– for heat or ultrasonic embedding – 




T-Lok 


846 0 and 846 1 


Internal Article Internal Article External Length Guidline values for receiving Minimum 

thread no. thread no. dia. hole dia. spacing 

Inch metric 

sizes sizes 

A A E E1B L +0.004 L1 +0.004 W 

2-56 

846 000 602 … 

846 100 602 … 

M 2 

846 000 020 … 

846 100 020 … 

0.141 

0.122 

0.113 

0.115 

0.188 

0.123 

0.118 

0.107 

0.083 

4-40 

846 000 604 … 

846 100 604 … 

M 2.5 

846 000 025 … 

846 100 025 … 

0.171 

0.157 

0.146 

0.134 

0.219 

0.159 

0.154 

0.142 

0.098 

6-32 

846 000 606 … 

846 100 606 … 

M 3 

846 000 030 … 

846 100 030 … 

0.218 

0.203 

0.189 

0.15 

0.25 

0.206 

0.189 

0.185 

0.118 

M 3.5 

846 000 035 … 

846 100 035 … 

0.218 

0.203 

0.189 

0.15 

0.25 

0.206 

0.189 

0.185 

0.118 

8-32 

846 000 608 … 

846 100 608 … 

M 4 

846 000 040 … 

846 100 040 … 

0.25 

0.23 

0.213 

0.185 

0.311 

0.233 

0.224 

0.209 

0.138 

10-24 

846 000 610 … 

846 100 610 … 

0.297 

0.272 

0.251 

0.224 

0.374 

0.279 

0.268 

0.248 

0.157 

M 5 

846 000 050 … 

846 100 050 … 

0.327 

0.307 

0.283 

0.264 

0.437 

0.315 

0.303 

0.279 

0.177 

1/4-20 

846 000 625 … 

846 100 625 … 

M 6 

846 000 060 … 

846 100 060 … 

0.374 

0.354 

0.331 

0.3 

0.5 

0.362 

0.349 

0.319 

0.197 

5/16-18 846 000 631 … 846 100 631 … 

M 8 

846 000 080 … 

846 100 080 … 

0.469 

0.439 

0.406 

0.335 

0.563 

0.449 

0.429 

0.402 

0.256

Application 

For the manufacture of wearresistant 

screw fasteners with 

high loading capacity in hard 

plastics. 

Pressed-in threaded inserts 

Pressed-in threaded inserts 

– with flange – 



Mubux ® -A 


850 


Internal Article Internal Article External Length Minimum Hole dia. 

thread no. thread no. dia. wall thickness (guidline values) 


sizes sizes 

A A E B W L 

2-56 850 000 602.800 M 2 850 000 020.800 0.132 0.157 0.063 0.122 

4-40 850 000 604.800 M 2.5 850 000 025.800 0.165 0.209 0.079 0.15 

M 3 850 000 030.800 0.165 0.209 0.079 0.15 

6-32 850 000 606.800 M 3.5 850 000 035.800 0.197 0.248 0.098 0.181 

8-32 850 000 608.800 M 4 850 000 040.800 0.228 0.291 0.098 0.213 

10-24 850 000 610.800 M 5 850 000 050.800 0.26 0.327 0.098 0.244 

1/4-20 850 000 625.800 M 6 850 000 060.800 0.323 0.362 0.11 0.307 

5/16-18 850 000 631.800 M 8 850 000 080.800 0.382 0.362 0.15 0.366 

3/8-16 850 000 637.800 M 10 850 000 100.800 0.472 0.362 0.217 0.457 

Example for finding Pressed-in threaded insert Mubux-A to Works Standard series 850 with internal thread A = 10-24 

the article number made of brass: Mubux-A 850 000 610.800 

Thread UNC/UNF as per class 2B (please ask for minimum order volumes for unified threads) metric as per ISO 6H 

Mubux ® -AK 


852 


Internal Article Internal Article External Head dia. Head height Length 

thread no. thread no. dia. 

Inch metric (excluding flange) 

sizes sizes 

A A E E1 K B 

2-56 852 000 602.800 M 2 852 000 020.800 0.132 0.189 0.024 0.181 

4-40 852 000 604.800 M 2.5 852 000 025.800 0.165 0.22 0.024 0.232 

M 3 852 000 030.800 0.165 0.22 0.024 0.232 

6-32 852 000 606.800 M 3.5 852 000 035.800 0.197 0.252 0.031 0.279 

8-32 852 000 608.800 M 4 852 000 040.800 0.228 0.283 0.031 0.323 

10-24 852 000 610.800 M 5 852 000 050.800 0.26 0.315 0.039 0.366 

1/4-20 852 000 625.800 M 6 852 000 060.800 0.323 0.374 0.052 0.413 

5/16-18 852 000 631.800 M 8 852 000 080.800 0.382 0.433 0.052 0.413 

3/8-16 852 000 637.800 M 10 852 000 100.800 0.472 0.551 0.063 0.425 

For receiving hole diameter, see article no. 850 … … … 

Material Brass Article no. (fourth group of digits) … … … 800 

Tolerance ISO 2768-m 

Thread see article no. 850 … … … 

15

Application 

For the manufacture of wearresistant 

screw fasteners with 

high loading capacity in hard 

plastics. 

Pressed-in threaded studs 

Thread Article Thread Article External Length 

Inch no. metric no. dia. 

sizes sizes 

A A E B 

2-56 866 000 602.8.. M 2 866 000 020.8.. 0.142 0.157 

4-40 866 000 604.8.. M 2.5 866 000 025.8.. 0.181 0.228 

M 3 866 000 025.8.. 0.181 0.228 

6-32 866 000 606.8.. M 3.5 866 000 035.8.. 0.216 0.283 

8-32 866 000 608.8.. M 4 866 000 040.8.. 0.248 0.323 

10-24 866 000 610.8.. M 5 866 000 050.8.. 0.276 0.374 

1/4-20 866 000 625.8.. M 6 866 000 060.8.. 0.339 0.5 

5/16-18 866 000 631.8.. M 8 866 000 080.8.. 0.402 0.5 

Pressed-in threaded studs 

– with flange – 

Thread length = S-2P 

P = Threaded pitch 


Mubux ® -AS 


856 


Article no. Length Available 

(eleventh digit) 

M3 M5 / 610 

M2 / 602 M3.5 / 606 M6 / 625 

S M2.5 / 604 M4 / 608 M8 / 631 

… … … .20 0.236 X X X 

… … … .40 0.394 X X X 

… … … .60 0.63 X X X 

… … … .80 0.984 X X X 


Example for finding Threaded insert Mubux-AS stud A = 10-24 to Works Standard series 856, length of the stud = 0.394 

the article number made of brass: Mubux-AS 856 000 610.840 

Thread UNC/UNF as per class 2B (please ask for minimum order volumes for unified threads) 


Mubux ® -ASK 


857 


Thread Article Thread Article External Head dia. Head height Length 


sizes sizes (excluding flange) 

A A E E1K B 

2-56 867 000 602.8.. M 2 867 000 020.8.. 0.142 0.189 0.024 0.181 

4-40 867 000 604.8.. M 2.5 867 000 025.8.. 0.181 0.22 0.024 0.252 

M 3 867 000 025.8.. 0.181 0.22 0.024 0.252 

6-32 867 000 606.8.. M 3.5 867 000 035.8.. 0.216 0.252 0.031 0.315 

8-32 867 000 608.8.. M 4 867 000 040.8.. 0.248 0.283 0.031 0.354 

10-24 867 000 610.8.. M 5 867 000 050.8.. 0.276 0.315 0.039 0.413 

1/4-20 867 000 625.8.. M 6 867 000 060.8.. 0.339 0.374 0.052 0.551 

5/16-18 867 000 631.8.. M 8 867 000 080.8.. 0.402 0.433 0.052 0.551 

Available stud lengths: See table For receiving hole diameter, see article no. 850 … … … 

Material Brass 

Other materials, e.g. steel or light alloy, on request 

Article no. (fourth group of digits) … … … 800 


Thread see article no. 856 … … …

Application 

For creation of wear and vibra- 

tion-resistant screw fastenings 

with high load capacity in plastic 

moulded components, preferably 

thermoset plastic. The insert is 

anchored in the moulded com- 



Internal Article Internal Article External Length Number of Minimum Hole dia. 

thread no. thread no. dia. vanes wall (guideline 

Inch metric thickness values) 

sizes sizes 

A A E B W L 

2-56 812 000 602.800 M 2 812 000 020.800 0.136 0.157 2 0.063 0.126 

M 2.5 813 000 025.800 0.17 0.189 3 0.079 0.157 

4-40 813 000 604.800 M 3 813 000 030.800 0.17 0.189 3 0.079 0.157 

6-32 813 000 606.800 M 3.5 813 000 035.800 0.201 0.252 3 0.094 0.189 

8-32 814 000 608.800 M 4 814 000 040.800 0.232 0.315 4 0.11 0.22 

10-24 815 000 610.800 M 5 815 000 050.800 0.264 0.374 5 0.126 0.252 

1/4-20 815 000 625.800 M 6 815 000 060.800 0.327 0.5 5 0.157 0.315 

5/16-18 815 000 631.800 M 8 815 000 080.800 0.39 0.5 5 0.189 0.374 

1) Max. conicity +0.0016 

Example for finding Self-locking threaded insert B-Lok-MV to Works Standard with internal thread A = 10-24 

the article number and 5 vanes made of brass: B-Lok-MV 815 000 610.800 




Expansion inserts 

– self-locking – 

ponent by precision anchoring 

vanes, and torque safety is provided 

by a gear ring. The screw is 

rendered resistant to vibration by 

the clamping action of the two 

segments. 

Thread Internal thread A: UNC/UNF as per class 2B (please ask for minimum order volumes for unified threads) 


Other internal threads (left-handed, unified or BA sizes, multiple threads), special dimensions and different 

numbers of vanes with the same length and same internal thread on request. 


B-Lok ® -MV 


812 to 815 

17

Application 

For creation of wear and vibraionresistant 

screw fastenings 

with high load capacity in plastic, 

preferably duroplastics. 


– self-locking – 


– self-locking with flange – 


B-Lok ® -R 


841 


Internal Article Internal Article External Length Minimum Hole dia. 

thread no. thread no. dia. wall thickness (guidline values) 


sizes sizes 

A A E B W L 

2-56 841 000 602.800 M 2 841 000 020.800 0.14 0.157 0.094 0.126 to 0.13 

4-40 841 000 604.800 M 2.5 841 000 025.800 0.169 0.189 0.126 0.157 to 0.161 

M 3 841 000 030.800 0.169 0.189 0.126 0.157 to 0.161 

6-32 841 000 606.800 M 3.5 841 000 035.800 0.201 0.252 0.142 0.185 to 0.189 

8-32 841 000 608.800 M 4 841 000 040.800 0.236 0.315 0.157 0.217 to 0.22 

10-24 841 000 610.800 M 5 841 000 050.800 0.268 0.374 0.189 0.248 to 0.252 

1/4-20 841 000 625.800 M 6 841 000 060.800 0.331 0.5 0.236 0.311 to 0.315 

5/16-18 841 000 631.800 M 8 841 000 080.800 0.39 0.5 0.276 0.374 to 0.378 

Example for finding Self-locking threaded insert B-Lok-R to Works Standard series 841 with internal thread A = 10-24 

the article number made of brass: B-Lok-R 841 000 610.800 



Application 

With additional countering flange, 

used in through holes in laminates 

and housing walls. 

B-Lok ® -RK 


842 


Internal Article Internal Article External Length Head of Minimum Hole dia. 

thread no. thread no. dia. dia. wall (guideline 

Inch metric (excluding thickness values) 

sizes sizes flange) 

A A E B E1 W L 

2-56 842 000 602.800 M 2 842 000 020.800 0.14 0.157 0.189 0.094 0.126 to 0.13 

4-40 842 000 604.800 M 2.5 842 000 025.800 0.169 0.189 0.22 0.11 0.157 to 0.161 

M 3 842 000 025.800 0.169 0.189 0.22 0.126 0.157 to 0.161 

6-32 842 000 606.800 M 3.5 842 000 035.800 0.201 0.252 0.252 0.142 0.185 to 0.189 

8-32 842 000 608.800 M 4 842 000 040.800 0.236 0.315 0.283 0.157 0.217 to 0.22 

10-24 842 000 610.800 M 5 842 000 050.800 0.268 0.374 0.315 0.189 0.248 to 0.252 

1/4-20 842 000 625.800 M 6 842 000 060.800 0.331 0.5 0.374 0.236 0.311 to 0.315 

5/16-18 842 000 631.800 M 8 842 000 080.800 0.39 0.5 0.433 0.236 0.374 to 0.378 

Example for finding Self-locking threaded insert B-Lok-RK to Works Standard 842 with internal thread A = 10-24 

the article number made of brass: B-Lok-RK 842 000 610.800 




Thread see article no. 841 … … …

Application 

For the manufacture of wear and 

vibration-resistant screw fasteners 

with high loading capacity 

in plastic, preferably thermoplastic 

Threaded inserts 


plastics. The inserts are pressed 

into pre-formed receiving holes 

while the wall is softened 

using heat or ultrasonic 

Internal Article Internal Article External Length Hole dia. Minimum 

thread no. thread no. dia. (guideline wall 

Inch metric values) thickness 

sizes sizes +0.004 

A A E B L W 

2-56 860 000 602.800 M 2 860 000 020.800 0.142 0.157 0.126 0.079 

4-40 860 000 604.800 M 2.5 860 000 025.800 0.181 0.228 0.157 0.091 

M 3 860 000 030.800 0.181 0.228 0.157 0.091 

6-32 860 000 606.800 M 3.5 860 000 035.800 0.216 0.283 0.189 0.098 

8-32 860 000 608.800 M 4 860 000 040.800 0.248 0.323 0.22 0.098 

10-24 860 000 610.800 M 5 860 000 050.800 0.276 0.374 0.252 0.106 

1/4-20 860 000 625.800 M 6 860 000 060.800 0.339 0.5 0.315 0.118 

5/16-18 860 000 631.800 M 8 860 000 080.800 0.402 0.5 0.378 0.138 

3/8-16 860 000 637.800 M 10 860 000 100.800 0.484 0.5 0.461 0.157 


– for heat or ultrasonic embedding with flange – 



S-Lok ® 


860 / 861 


Example for finding Threaded insert S-Lok without head to Works Standard 860 with internal thread A = 10-24 

the article number made of brass: S-Lok 860 000 610.800 



Article Length 

no. 

short 

version 

B 

861 000 604.800 0.157 

861 000 606.800 0.228 

861 000 608.800 0.283 

861 000 610.800 0.323 

861 000 625.800 0.374 

861 000 631.800 0.374 

861 000 637.800 0.374 

S-Lok ® -K 


862 





sizes sizes 

A A E E1K B 

2-56 860 000 602.800 M 2 860 000 020.800 0.142 0.189 0.024 0.181 

4-40 860 000 604.800 M 2.5 860 000 025.800 0.181 0.22 0.024 0.252 

M 3 860 000 030.800 0.181 0.22 0.024 0.252 

6-32 860 000 606.800 M 3.5 860 000 035.800 0.216 0.252 0.031 0.315 

8-32 860 000 608.800 M 4 860 000 040.800 0.248 0.283 0.031 0.354 

10-24 860 000 610.800 M 5 860 000 050.800 0.276 0.315 0.039 0.413 

1/4-20 860 000 625.800 M 6 860 000 060.800 0.339 0.374 0.052 0.551 

5/16-18 860 000 631.800 M 8 860 000 080.800 0.402 0.433 0.052 0.551 

3/8-16 860 000 637.800 M 10 860 000 100.800 0.484 0.551 0.052 0.551 


Material Brass 


Article no. (fourth group of digits) … … … 800 


Thread see article no. 860 … … … 

19

Application 

For the manufacture of wear 

and vibration-resistant screw 

fasteners with high loading 

capacity in plastic, preferably 

thermoset plastics. 



The inserts are pressed into 

pre-formed receiving holes 

with 4° draft angle incline 

during softening of the hole 

wall by means of heating or 

ultrasonic technology. 

Internal Article Internal Article External Length Hole dia. Minimum 

thread no. thread no. dia. (guideline wall depth 

Inch metric values) (with ABS) 

sizes sizes +0.004 

A A E B L W 

2-56 853 200 602.800 M 2 853 200 020.800 0.161 0.197 0.15 0.059 

4-40 853 200 604.800 M 2.5 853 200 025.800 0.161 0.197 0.15 0.059 

M 3 853 200 030.800 0.185 0.217 0.173 0.071 

6-32 853 200 606.800 M 3.5 853 200 035.800 0.217 0.236 0.205 0.071 

8-32 853 200 608.800 M 4 853 200 040.800 0.24 0.295 0.228 0.079 

10-24 853 200 610.800 M 5 853 200 050.800 0.287 0.354 0.272 0.098 

1/4-20 853 200 625.800 M 6 853 200 060.800 0.35 0.394 0.335 0.098 

5/16-18 853 200 631.800 M 8 853 200 080.800 0.445 0.472 0.429 0.118 




S-Lok ® -KOH 


853 2 / 854 2 


Article Length 

no. 

short 

version 

B 

854 200 030. 800 0.197 

854 200 035. 800 0.217 

854 200 040. 800 0.236 

854 200 050. 800 0.276 

854 200 060. 800 0.354 

Example for finding Threaded insert S-Lok-KOH without head to Works Standard 853 2 with draft angle 4°, internal thread, 

the article number A = 10-24 made of brass: S-Lok-KOH 853 200 610.800 



S-Lok ® -KOHK 


855 2 





sizes sizes 

A A E E1K B 

2-56 855 200 602.800 M 2 855 200 020.800 0.161 0.197 0.024 0.22 

4-40 855 200 604.800 M 2.5 855 200 025.800 0.161 0.252 0.024 0.22 

M 3 855 200 030.800 0.185 0.252 0.024 0.24 

6-32 855 200 606.800 M 3.5 855 200 035.800 0.217 0.276 0.031 0.268 

8-32 855 200 608.800 M 4 855 200 040.800 0.24 0.315 0.031 0.327 

10-24 855 200 610.800 M 5 855 200 050.800 0.287 0.335 0.039 0.394 

1/4-20 855 200 625.800 M 6 855 200 060.800 0.35 0.394 0.039 0.433 

5/16-18 855 200 631.800 M 8 855 200 080.800 0.445 0.492 0.051 0.524 

For receiving hole diameter, see article no. 853 200 … … 



Thread see article no. 853 200 … …

Application 

For the manufacture of wear and 

vibration-resistant screw fasteners 

with high loading capacity 

in plastic, preferably thermoplastic 

Threaded studs 


plastics. The inserts are pressed 

into pre-formed receiving holes 

while the wall is softened 

using heat or ultrasonic. 

Thread Article Thread Article External Length 


sizes sizes 

A A E B 

2-56 866 000 602.8.. M 2 866 000 020.8.. 0.142 0.157 

4-40 866 000 604.8.. M 2.5 866 000 025.8.. 0.181 0.228 

M 3 866 000 025.8.. 0.181 0.228 

6-32 866 000 606.8.. M 3.5 866 000 035.8.. 0.216 0.283 

8-32 866 000 608.8.. M 4 866 000 040.8.. 0.248 0.323 

10-24 866 000 610.8.. M 5 866 000 050.8.. 0.276 0.374 

1/4-20 866 000 625.8.. M 6 866 000 060.8.. 0.339 0.5 

5/16-18 866 000 631.8.. M 8 866 000 080.8.. 0.402 0.5 

Threaded studs 



Thread length = S-2P 

P = Threaded pitch 


S-Lok ® -S 


866 



(eleventh digit) 

M3 M5 / 610 

M2 / 602 M3.5 / 606 M6 / 625 

S M2.5 / 604 M4 / 608 M8 / 631 

… … … .20 0.236 X X X 

… … … .40 0.394 X X X 

… … … .60 0.63 X X X 

… … … .80 0.984 X X X 


Example for finding S-Lok-S stud to Works Standard series 866 with thread A = 10-24 and length of the stud = 0.394 

the article number made of brass: S-Lok-S 866 000 610.840 



S-Lok ® -SK 


867 


Thread Article Thread Article External Head dia. Head height Length 


sizes sizes (excluding flange) 

A A E E1K B 

2-56 867 000 602.8.. M 2 867 000 020.8.. 0.142 0.189 0.024 0.181 

4-40 867 000 604.8.. M 2.5 867 000 025.8.. 0.181 0.22 0.024 0.252 

M 3 867 000 025.8.. 0.181 0.22 0.024 0.252 

6-32 867 000 606.8.. M 3.5 867 000 035.8.. 0.216 0.252 0.031 0.315 

8-32 867 000 608.8.. M 4 867 000 040.8.. 0.248 0.283 0.031 0.354 

10-24 867 000 610.8.. M 5 867 000 050.8.. 0.276 0.315 0.039 0.413 

1/4-20 867 000 625.8.. M 6 867 000 060.8.. 0.339 0.374 0.052 0.551 

5/16-18 867 000 631.8.. M 8 867 000 080.8.. 0.402 0.433 0.052 0.551 

Available stud lengths: See table For receiving hole diameter, see article no. 860 … … … 




Thread see articlno. 866 … … … 

21

Installation 

Punch or drill a hole, insert Anchor and 

rivet the shank with a simple rivetting 

tool (Fig. 1 + 2): 

manually 

using a pneumatic manual rivetting 

hammer 

using a simple press 

by inserting Anchor and rivetting 

using a tumble or radial riveting 

process 

automatic feed in follow-on tools 

with special high-performance installation 

devices for large-scale series. 

Output up to 50 parts per minute 

To avoid deformation of thin sheet 

metal components use a doubleacting 

rivetting tool (Fig. 3) 

Anchor® installation … 

Fig. 1 

Material of the rivetting tool: Steel 115 CrV3 (1.2210) 

Hardness: 58 to 62 HRc,shank 20 to 25 HRc. 

Tkxgvvkpi"rtguuwtg"R 

with mechanical rivetting 

(Anchor made of steel) 

M 2 / M 3 appr. 15 to 27 kN 

2-56 / 4-40 

M 4 appr. 20 to 30 kN 

6-32 / 8-32 


10-24 


1/4-20 


5/16-18 

M 10 appr. 65 to 97 kN 

3/8-16 

M 12 - M 16 appr. 80 to 160 kN 

7/16-14 - 5/8-11 

Fkogpukqpu"qh"vjg"tkxgvvkpi"vqqnu"*Hki0"4+< 

Article no. 401 Article no. 421 

for Anchor and Anchor Blind for Anchor-Mini 

E1 R1 R2 E2 E E1R1 R2 E2 E 

M 2 0.169 0.024 0.02 0.28 0.472 0.094 0.024 0.02 0.189 0.472 

2-56 

M 2.5 / M 3 0.169 0.024 0.02 0.28 0.472 0.126 0.024 0.02 0.217 0.472 

3-48 / 4-40 

M 3.5 / M 4 0.209 0.028 0.02 0.343 0.472 0.169 0.024 0.02 0.28 0.472 

6-32 / 8-32 

M 5 0.264 0.035 0.02 0.406 0.63 0.209 0.024 0.02 0.343 0.472 

10-24 

M 6 0.315 0.039 0.024 0.469 0.63 0.256 0.024 0.024 0.406 0.472 

1/4-20 

M 8 0.437 0.043 0.024 0.61 0.787 0.335 0.024 0.02 0.453 0.472 

5/16-18 

M 10 0.531 0.047 0.024 0.72 0.787 - - - - - 

3/8-16 

M 12 - M 16 0.673 0.055 0.024 0.874 0.984 - - - - - 

7/16-14 - 5/8-11 


Fig. 2 

5.906 ±0.02 

Rivetting tool 

Helical spring 

Anchor 

Anchor 

retainer 

Fig. 3 

Pressure body 

Sheet metal

Application 

Anchor is a rivet bushing for 

captive, torque-resistant screw 

connections capable of 

withstanding loads from both 

sides in thin-walled workpieces 

(0.019 to 0.2 thickness) 

Article no. for sheet metal 

of the thickness 

first group 

of digits 

M 

701 … … … 0.019 to 0.024 1) 

702 … … … 0.028 1) 

703 … … … 0.031 1) 

704 … … … 0.035 to 0.039 1) 

705 … … … 0.043 to 0.051 1) 

706 … … … 0.055 to 0.063 1) 

707 … … … 0.067 to 0.075 2) 

708 … … … 0.079 to 0.087 2) 

709 … … … 0.091 to 0.098 2) 

710 … … … 0.102 to 0.11 2) 

711 … … … 0.114 to 0.122 2) 

712 … … … 0.126 to 0.134 2) 

713 … … … 0.138 to 0.146 2) 

714 … … … 0.15 to 0.157 2) 

715 … … … 0.161 to 0.169 2) 

716 … … … 0.173 to 0.181 2) 

717 … … … 0.185 to 0.193 2) 

718 … … … 0.197 2) 

1) Shoulder 20° undercut 

2) Surfaced shoulder 

Rivet Bushing 

– serrated – 



Anchor ® 


701 0 to 718 0 

Please note: The first group of digits is applicable for conventional rivetting; for flush processing / stainless workpieces we 

recommend using shank lengths for the next smallest sheet metal thickness! 

Example for finding Serrated rivet bushing Anchor with internal thread 8-32 to Works Standard 708 0, made of steel for sheet 

the article number thickness 0.079: Anchor 708 000 608.100 

Materials Steel, unhardened, unrefined Article no. (fourth group of digits) … … … 100 

Steel, unhardened, zinc plated, clear chromated Article no. (fourth group of digits) … … … 110 

Steel, unhardened, zinc plated, yellow chromated Article no. (fourth group of digits) … … … 120 

Steel, unhardened, zinc/nickel plated, transparent passivated Article no. (fourth group of digits) … … … 143 


Ligth alloy Article no. (fourth group of digits) … … … 700 



The Anchor is suitable for thin walled 

moulded components made of 

– steel 

– alloy 

– NF metals and 

– plastic 


Article no. Internal External Nut Recommended 

of the thread size diameter height hole diameter 

second and 

third group 

+0.004 

of digits A E K L 

… 000 020 ... 

… 000 602 ... 

M 2 

2-56 

0.315 0.126 0.236 

… 000 025 ... 

… 000 603 ... 

M 2.5 

3-48 

0.315 0.126 0.236 

… 000 030 ... 

… 000 604 ... 

M 3 

4-40 

0.315 0.126 0.236 

… 000 035 ... 

… 000 606 ... 

M 3.5 

6-32 

0.374 0.15 0.276 

… 000 040 ... 

… 000 608 ... 

M 4 

8-32 

0.374 0.15 0.276 

… 000 050 ... 

… 000 610 ... 

M 5 

10-24 

0.433 0.173 0.331 

… 000 060 ... 

… 000 625 ... 

M 6 

1/4-20 

0.492 0.224 0.382 

… 000 080 ... 

… 000 631 ... 

M 8 

5/16-18 

0.63 0.252 0.52 

… 000 100 ... 

… 000 637 ... 

M 10 

3/8-16 

0.748 0.3 0.61 

… 000 120 ... 

… 000 644 ... 

M 12 

7/16-14 

1 0.402 0.772 

… 000 140 ... 

… 000 650 ... 

M 14 

1/2-13 

1 0.402 0.772 

… 000 160 ... 

… 000 662 ... 

M 16 

5/8-11 

1 0.402 0.772 

Other materials (e.g. steel, strength class 8) and versions (e.g. nut height or shank lengths for deviating 

sheet metal thickness) on request. 



Remark Also available as blind version Works Standard 740; for more information please see technical 

publication no. 40 

23

Application 

Anchor-Mini is a rivet bushing 

for captive, torque-resistant 

screw connections capable of 

withstanding loads from both 

sides in thin-walled workpieces 

(0.019 to 0.2 thickness) 

1) Shoulder 20° undercut 

2) Surfaced shoulder 

Rivet Bushing 

– serrated – 


Anchor ® -Mini 


721 0 to 738 0 

Please note: The first group of digits is applicable for conventional rivetting; for flush processing / stainless workpieces we 

recommend using shank lengths for the next smallest sheet metal thicknes! 

For optimum strength values, installation using the tumble or radial rivetting process is recommended. 

Example for finding Serrated rivet bushing Anchor-Mini with internal thread 8-32 to Works Standard 728 0, made of steel for 

the article number sheet thickness 0.079: Anchor 728 000 608.100 

Materials Steel, unhardened, unrefined Article no. (fourth group of digits) … … … 100 

Steel, unhardened, zinc plated, clear chromated Article no. (fourth group of digits) … … … 110 

Steel, unhardened, zinc plated, yellow chromated Article no. (fourth group of digits) … … … 120 

Steel, unhardened, zinc/nickel plated, transparent passivated Article no. (fourth group of digits) … … … 143 





made of 

– steel 

– alloy 

– NF metals and 

– plastic 

Article no. for sheet metal 

of the thickness 

first group 

of digits 

M 

721 … … … 0.019 to 0.024 1) 

722 … … … 0.028 1) 

723 … … … 0.031 1) 

724 … … … 0.035 to 0.039 1) 

725 … … … 0.043 to 0.051 1) 

726 … … … 0.055 to 0.063 1) 

727 … … … 0.067 to 0.075 2) 

728 … … … 0.079 to 0.087 2) 

729 … … … 0.091 to 0.098 2) 

730 … … … 0.102 to 0.11 2) 

731 … … … 0.114 to 0.122 2) 

732 … … … 0.126 to 0.134 2) 

733 … … … 0.138 to 0.146 2) 

734 … … … 0.15 to 0.157 2) 

735 … … … 0.161 to 0.169 2) 

736 … … … 0.173 to 0.181 2) 

737 … … … 0.185 to 0.193 2) 

738 … … … 0.197 2) 

The Anchor-Mini is 

particularly lightweigth 

and spacesaving 

due to 

minimal outside 

dimensions 


Article no. Internal External Nut Recommended 

of the thread size diameter height hole diameter 

second and 

third group 

+0.002 

of digits A E K L 

… 000 020 ... 

… 000 602 ... 

M 2 

2-56 

0.197 0.091 0.138 

… 000 025 ... 

… 000 603 ... 

M 2.5 

3-48 

0.217 0.11 0.165 

… 000 030 ... 

… 000 604 ... 

M 3 

4-40 

0.217 0.11 0.165 

… 000 035 ... 

… 000 606 ... 

M 3.5 

6-32 

0.276 0.126 0.217 

… 000 040 ... 

… 000 608 ... 

M 4 

8-32 

0.276 0.126 0.217 

… 000 050 ... 

… 000 610 ... 

M 5 

10-24 

0.335 0.15 0.256 

… 000 060 ... 

… 000 625 ... 

M 6 

1/4-20 

0.394 0.201 0.303 

… 000 080 ... 

… 000 631 ... 

M 8 

5/16-18 

0.472 0.256 0.382 

Other materials and versions and finishing types on request 


metric as per ISO 6H

Clifa® 

installation ... 

Installation 

The receiving hole is punched or drilled, 

but not deburred or countersunk. 

With punched holes, Clifa is pressed in 

from the punching burr side. The pressin 

process takes place on a plane 

parallel basis using a customary press 

with adjustable pressure level, until the 

surface of the shoulder in the Clifa 

press-in nut comes to rest flat against 

the surface of the sheet metal. 

In the case of the Clifa-SP stud, the 

head must be fully pressed in and come 

to rest flush with the surface of the 

sheet metal. 

Pressure which is too high or applied 

only on one side as well as inclined 

support surfaces must be avoided 

wherever possible. 

Examples for mounting 

Special request We recommend 


Press-in nut Clifa Press-in stud Clifa-SP 

short length Clifa-M (Works Standard 500 0 to 503 0) 

standoff bushings for metals Clifa-AM (Works Standard 503 8 to 525 8) 

standoff bushings for plastics Clifa-AL (Works Standard 503 6 to 525 6) 

threaded press-in stud 

for thin sheet metals 0.039 

Clifa-SPD (Works Standard 5.. 2) 


for high force 

Clifa-SA (Works Standard 515 4 to 534 4) 


for epoxy resin moulding materials 

Clifa-SL (Works Standard 506 7 to 518 7) 


for lower press-in force 

Clifa-SR (Works Standard 5.. 1) 


25

Application 

Clifa press-in nuts are used 

to create wear-free screw 

connections capable of 

withstanding high loads in 

thin-walled moulded 

components from 0.031 in 

thickness made of 

Example for finding Self-clinching press-in nut Clifa-M with internal thread 8-32 to Works Standard 502 0, made of hardened, 

the article number zinc plated and yellow chromated steel for sheet thickness 0.071: Clifa-M 502 000 608.100 

Materials Steel, hardened, zinc plated, yellow chromated Article no. (fourth group of digits) … … … 100 

Steel, hardened, zinc plated, clear chromated Article no. (fourth group of digits) … … … 110 

Steel, hardened, zinc/nickel plated, transparent passivated Article no. (fourth group of digits) … … … 143 




– Steel 

– Light alloy 

– NF metal 

(up to hardness HRB80) 

The nut is anchored in the component 

as a result of the press-in process. 

Internal Internal Article no. for sheet metal Shank 

thread thread of the thickness height 

Inch size first group max. 

Sizes metric of digits 

A A M S 

2-56 

to 

10-24 

M 2 

to 

M 5 

500 … … … 

501 … … … 

502 … … … 

503 … … … 

0.031 up to 0.039 

0.043 up to 0.055 

0.059 up to 0.091 

from 0.094 

0.028 

0.039 

0.051 

0.087 

1/4-20 

and 

5/16-18 

M6 

an d 

M 8 

500 … … … 

501 … … … 

502 … … … 

503 … … … 

0.039 up to 0.051 

0.055 up to 0.091 

0.094 up to 0.126 

from 0.13 

0.039 

0.053 

0.087 

0.118 

501 … … … 0.094 up to 0.126 0.087 

3/8-16 M 10 502 … … … 0.13 up to 0.248 0.118 

503 … … … from 0.252 0.236 

Other finishes or special shapes on request, stand-offs see technical publication no. 40 page 14 



Press-in pressure as a guidline value for selection of the press 

Clifa For shaped parts made of Steel 

2-56 / 3-48 M2 / M2.5 5 to 15 kN 

4-40 / 6-32 M3 5 to 17 kN 

8-32 M4 7 to 20 kN 

10-24 M5 7 to 25 kN 

1/4-20 M6 15 to 37 kN 

5/16-18 M8 17 to 40 kN 

3/8-16 M10 20 to 50 kN 

Press-in nut 

– self-clinching – 

The optimum press-in pressure must be determined by trial and error. 

In the case of light alloys, depending on the alloy composition and 

surface properties, higher press-in pressure levels may be necessary. 

Maximum retention is achieved when adhering precisely to the 

recommended hole diameter and tolerances. 


Clifa ® -M 


500 0 to 503 0 


Article no. Thread External Nut Hole dia. Minimum 

of the sizes dia. height Toleranze Spacing 

second and 

third group 

+0.002 

of digits A E K L W 

… 000 020 ... 

… 000 602 ... 

M 2 

2-56 

0.236 0.063 0.165 0.114 

… 000 025 ... 

… 000 603 ... 

M 2.5 

3-48 

0.236 0.063 0.165 0.114 

… 000 030 ... M 3 

… 000 604 ... 4-40 0.276 0.063 0.187 0.142 

… 000 606 ... 6-32 

… 000 040 ... 

… 000 608 ... 

M 4 

8-32 

0.315 0.094 0.213 0.15 

… 000 050 ... 

… 000 610 ... 

M 5 

10-24 

0.354 0.094 0.25 0.15 

… 000 060 ... 

… 000 625 ... 

M 6 

1/4-20 

0.433 0.173 0.344 0.181 

… 000 080 ... 

… 000 631 ... 

M 8 

5/16-18 

0.492 0.236 0.413 0.189 

… 000 100 ... 

… 000 637 ... 

M 10 

3/8-16 

0.591 0.264 0.5 0.189

Application 

Clifa press-in nuts are used to 

create wear-free screw connections 

in thin-walled moulded 

components from 0.031 

thickness. 

Internal Internal Article no. for sheet metal Shank 

thread thread of the thickness height 

Inch size first group max. 

Sizes metric of digits 

A A M S 

2-56 M 3 500 … … … 0.031 up to 0.039 0.028 

to to 501 … … … 0.043 up to 0.055 0.039 

10-24 M 5 502 … … … 0.059 up to 0.091 0.051 

500 … … … 0.039 up to 0.051 0.039 

1/4-20 M 6 501 … … … 0.055 up to 0.091 0.053 

502 … … … 0.094 up to 0.126 0.087 

Press-in pressure as a guidline value for selection of the press 


Example for finding Self-clinching press-in nut Clifa-P with internal thread 8-32 to Works Standard 502 5, made of tempered, 

the article number zinc plated and clear chromated steel for sheet thickness 0.055: Clifa-M 502 500 608.110 

Materials Steel, tempered, zinc plated, clear chromated Article no. (fourth group of digits) … … … 110 

Steel, tempered, zinc/nickel plated, transparent passivated Article no. (fourth group of digits) … … … 143 


Other finishes or special shapes on request 



Clifa For shaped parts made of Steel 

2-56 / 4-40 / 6-32 M3 5 to 17 kN 

8-32 M4 7 to 20 kN 

10-24 M5 7 to 25 kN 

1/4-20 M6 15 to 37 kN 

Press-in nut 








Clifa ® -P 


500 5 to 502 5 


Article no. Thread External Nut Hole dia. Minimum 

of the sizes dia. height Toleranze Spacing 

second and 

third group 

±0.004 +0.003 

of digits A E K L W 

… 000 030 ... M 3 

… 000 602 ... 2-56 

… 000 604 ... 4-40 

… 000 606 ... 6-32 

… 000 040 ... M 4 

… 000 608 ... 8-32 

… 000 050 ... M 5 

… 000 610 ... 10-24 

… 000 060 ... M 6 

… 000 625 ... 1/4-20 

0.248 0.059 0.167 0.106 

0.311 0.079 0.213 0.165 

0.343 0.079 0.252 0.154 

0.435 0.161 0.344 0.167 

27

Application 

Clifa-ABO press-fit threaded 

bushings are intended for the 

production of wear-resistant 

screw-connections in thinwalled 

molded parts from 

thickness 0.393. 

Example for finding Press-fit threaded bushing Clifa-ABO to Works Standard series 570 0 with internal thread A = 6-32 

the article number bushing length 0.394 made of hardened, zinc plated and clear chromated steel, for sheet metal thickness 

from 0.051: Clifa-ABO 570 010 610. 110 

Bushing length B available from 0.118 to 0.984 in intervals of 0.039 

The fourth of digit of the article number is used to distinguish the width across flats E1 for the thread 

dimensions 4-40, 6-32 and M3; the fifth and sixth digits are used to indicate the bushing length B. 

Materials Case-hardened steel, zinc plated, clear chromated Article no. (fourth group of digits) … … … 110 


The hexagon is pressed 

flush into round mounting 

holes. 

Internal Internal Article no. Width For sheet External Counter bore Hole Minimum 

thread thread of the across metal diameter diameter Diameter Spacing 

Inch metric first group flats thickness -0.005 ±0.005 +0.003 

sizes sizes of digits 

A A SW M E A1 T W 

4-40 M 3 570 0.. ... ... 0.189 from 0.039 0.165 0.126 0.165 0.154 

4-40 

6-32 

M 3 570 1.. ... ... 0.252 from 0.039 0.212 0.126 0.213 0.161 

6-32 

8-32 

M 4 570 0.. ... ... 0.311 from 0.051 0.28 0.189 0.283 0.173 

10-24 M 5 570 0.. ... ... 0.311 from 0.051 0.28 0.189 0.283 0.173 




Clifa-ABO Press-in pressure 

4-40 / 6-32 M3 20 to 25 kN 

8-32 M4 30 to 40 kN 

10-24 M5 40 to 50 kN 

Press-fit threaded standoff bushings 

– through – 

for metals 

Internal Article no. Internal Article no. bushing length 

thread of the thread of the +0.002 / -0.005 

Inch third group metric third group 

sizes of digits sizes of digits 

A A B 

4-40 ... ... 604 ... M 3 ... ... 030 ... 

4-40 

6-32 

... 1.. 604 ... 

... 1.. 606 ... 

M 3 ... 1.. 030 ... 

0.118 to 0.315 0.354 to 0.472 

6-32 

8-32 

... ... 606 ... 

... ... 608 ... 

M 4 ... ... 040 ... 

0.118 to 0.315 0.354 to 0.591 0.748 to 0.827 0.866 to 0.984 

10-24 ... ... 610 ... M 5 ... ... 050 ... 

bore depth B1 none 0.157 0.315 0.433 







Clifa ® -ABO 


570 0 / 570 1 

All dimensions in inches unless otherwise noted

Application 

Clifa-ABG press-fit threaded 

bushings with blind tapped 

hole (sealed thread) for the 

production of wear-resistant, 

heavy duty screw-connections 

in thin-walled moulded parts 

from thickness 0.393. 


Example for finding Press-fit threaded bushing Clifa-ABG to Works Standard series 571 0 with internal thread A = 6-32 UNC 

the article number bushing length 0.394 made of hardened, zinc plated and clear chromated steel, for sheet metal thickness 

from 0.051: Clifa-ABG 571 010 610. 110 

Bushing length B available from 0.315 to 0.984 in intervals of 0.039 

The fourth of digit of the article number is used to distinguish the width across flats E1 for the thread 

dimensions 4-40, 6-32 and M3; the fifth and sixth digits are used to indicate the bushing length B. 

Materials Case-hardened steel, zinc plated, clear chromated Article no. (fourth group of digits) … … … 110 


The hexagon is pressed 

flush into round mounting 

holes. 

Internal Internal Article no. Width For sheet External Counter bore Hole Minimum 

thread thread of the across metal diameter diameter Diameter Spacing 

Inch metric first group flats thickness -0.005 ±0.005 +0.003 

sizes sizes of digits 

A A SW M E A1 T W 

4-40 M 3 571 0.. ... ... 0.189 from 0.039 0.165 0.126 0.165 0.154 

4-40 

6-32 

M 3 571 1.. ... ... 0.252 from 0.039 0.212 0.126 0.213 0.161 

6-32 

8-32 

M 4 571 0.. ... ... 0.311 from 0.051 0.28 0.189 0.283 0.173 

10-24 M 5 571 0.. ... ... 0.311 from 0.051 0.28 0.189 0.283 0.173 




Clifa-ABG Press-in pressure 

4-40 / 6-32 M3 20 to 25 kN 

8-32 M4 30 to 40 kN 

10-24 M5 40 to 50 kN 

Press-fit threaded standoff bushings 

– blind – 

for metals 

Internal Article no. Internal Article no. bushing length 

thread of the thread of the +0.002 / -0.005 

Inch third group metric third group 

sizes of digits sizes of digits 

A A B 

4-40 ... ... 604 ... M 3 ... ... 030 ... 

4-40 

6-32 

... 1.. 604 ... 

... 1.. 606 ... 

M 3 ... 1.. 030 ... 

0.315 to 0.433 0.472 to 0.512 0.551 to 0.669 0.709 to 0.984 

6-32 

8-32 

... ... 606 ... 

... ... 608 ... 

M 4 ... ... 040 ... 

0.118 to 0.315 0.354 to 0.591 0.748 to 0.827 0.886 to 0.984 

10-24 ... ... 610 ... M 5 ... ... 050 ... 

thread length C 0.157 0.197 0.256 0.374 







Clifa ® -ABG 


571 0 / 571 1 


29

Application 

These Clifa press-in studs are 

particularly suited for creating 

torque-resistant screw connections 

capable of withstanding 

high loads in thin-walled 

moulded compounds. 

– Steel 

– Stainless steel 

– Brass 

– Copper 

– Light alloy etc. 

The stud is anchored in the component by 

serrations as a result of the press-in process. 


of the 

first group 

of digits 

±0.008 

(selection M 2.5 M 3 M 4 M 5 M 6 M 8 

series) B*) 3-48 4-40 8-32 10-24 1/4-20 5/16-18 

506 ... ... ... 0.236 X X X X 

508 ... ... ... 0.315 X X X X X 

510 ... ... ... 0.394 X X X X X X 

512 ... ... ... 0.472 X X X X X X 

515 ... ... ... 0.591 X X X X X X 

518 ... ... ... 0.709 X X X X X X 

520 ... ... ... 

. 

0.787 

. 

X 

. 

X 

. 

X 

. 

X 

. 

X 

. 

X 

. 

534 ... ... ... 1.339 X X X X X X 

Example for finding Self-clinching press-in stud Clifa-SP with external thread 8-32 and serrations at the head to Works Standard the 

article number 506 0, made of tempered, zinc plated and yellow chromated steel and 0.394 long for sheet thickness 0.047: 

Clifa-SP 510 000 608.100 

Standard Coarse serration at the head Clifa-SP Article no. 5.. 000 … … 

For lower press-in force Fine serration at the head Clifa-SR Article no. 5.. 100 … … 

For sheet metal under 0.039 Thin-metal press-in stud Clifa-SPD Article no. 5.. 200 … … 

Materials Steel, tempered, zinc plated, yellow chromated Article no. (fourth group of digits) … … … 100 

Steel, tempered, zinc plated, clear chromated Article no. (fourth group of digits) … … … 110 


Stainless steel Article no. (fourth group of digits) … … … 500 


Thread Stud thread A: UNC/UNF as per class 2B (please ask for minimum order volumes for unified threads) 

*) Length B available up to 2.362 

metric as per ISO 6g 

Press-in stud 


Article no. Thread For sheet Hole dia. Minimum Tightening 

of the sizes metal tolerance spacing torque of the 

second and thickness +0.002 nut (sheet 

third group metal) 

of digits A ≥ L ≥ W ≤ Nm 

... .00 025 ... M 2.5 0.098 

0.039 0.138 0.7 

... .00 603 ... 3-48 0.102 

... .00 030 ... M 3 0.118 

0.039 0.157 1.3 

... .00 604 ... 4-40 0.112 

... .00 040 ... M 4 0.157 

0.039 0.197 2.9 

... .00 608 ... 8-32 0.163 

... .00 050 ... M 5 0.197 

0.039 0.197 6.0 

... .00 610 ... 10-24 0.191 

... .00 060 ... M 6 0.236 

0.059 0.197 10.0 

... .00 625 ... 1/4-20 0.25 

... .00 080 ... M 8 0.315 

0.059 0.236 20.0 

... .00 631 ... 5/16-18 0.315 

Anvil Hole Countersink Press-in 

for for serrations pressure 

Clifa L1 N kN 

M 2.5 

3-48 

M 3 

4-40 

M 4 

8-32 

M 5 

10-24 

M 6 

1/4-20 

M 8 

5/16-18 

0.102 

0.099 

0.122 

0.116 

0.161 

0.168 

0.201 

0.22 

0.24 

0.254 

0.319 

0.316 

0.134 

0.157 

0.205 

0.252 

0.299 

0.402 

8.9 to 12 

10.5 to 19 

16 to 25 

29 to 35 

30 to 50 

30 to 60 

The press-in pressure F is dependent on the Clifa dimension, the material and the thickness of the shaped component and also the type of serration 

at the head. The Clifa head must be fully embedded and must come to rest flush with the surface of the sheet metal. Excessive force 

must be avoided. The hole diameter of the part to be screwed on ≈ A+0.024. 


Clifa ® -SP/-SR/-SPD 


506 to 534 

All dimensions in inches unless otherwise noted

Application 

These Clifa press-in studs are particularly suited for creating 

torque-resistant screw connections capable of withstanding 

high loads in thin-walled moulded compounds. 

The reinforced head shape permits higher loading capacity 

to be achieved. 

Article no. Length Preferred size **) 

of the 

first group 

of digits 

±0.008 

(selection M 3 M 4 M 5 M 6 M 8 M 10 

series) B*) 4-40 8-32 10-24 1/4-20 5/16-18 3/8-16 

510 ... ... ... 0.394 X X X X 

515 ... ... ... 0.591 X X X X X X 

520 ... ... ... 0.787 X X X X X X 

525 ... ... ... 0.984 X X X X X X 

530 ... ... ... 1.181 X X X X X X 

534 ... ... ... 1.339 X X X X X X 

Example for finding Self-clinching press-in stud Clifa-SA with external thread 8-32 and serrations at the head to Works Standard the 

article number 506 4, made of tempered, zinc plated and yellow chromated steel and 0.394 long for sheet 

thickness 0.039: Clifa-SA 510 000 608.100 

Materials Steel, tempered, zinc plated, yellow chromated Article no. (fourth group of digits) … … … 100 

Steel, tempered, zinc plated, clear chromated Article no. (fourth group of digits) … … … 110 


Standard Coarse serration at the head Clifa-SA Article no. 5.. 400 … … 

For sheet metal under 0.039 Thin-metal press-in stud Clifa-SAD Article no. 5.. 900 … … 

**) Preferred size Clifa-SAD only available in following sizes 1/4-20; 5/16-18 and 3/8-16 


Thread Stud thread A: UNC/UNF as per class 2B (please ask for minimum order volumes for unified threads) 

metric as per ISO 6g 

Other dimensions on request 

*) Length B available up to 2.362 

Press-in stud 


Press-in Stud with several dog point on request. 

See inquiry data sheet on page 21 

technical publication no. 40. 


Article no. Thread For sheet Head Head Hole Minimum Tighteof 

the sizes metal dia. High dia. spacing ning M D 

second and thickness ±0.008 +0.004 (sheet 

third group metal) 

of digits A ≥ E K L ≥ W ≤ Nm 

... .00 030 ... M 3 0.118 

0.039 0.236 0.031 0.335 1.3 

... .00 604 ... 4-40 0.112 

... .00 040 ... M 4 0.157 

0.039 0.295 0.047 0.374 2.9 

... .00 608 ... 8-32 0.163 

... .00 050 ... M 5 0.197 

0.047 0.335 0.059 0.413 6.0 

... .00 610 ... 10-24 0.191 

... .00 060 ... M 6 0.236 

0.047 0.394 0.059 0.453 10.0 

... .00 625 ... 1/4-20 0.25 

... .00 080 ... M 8 0.315 

0.059 0.492 0.069 0.492 25.0 

... .00 631 ... 5/16-18 0.315 

... .00 100 ... M 10 0.394 

0.079 0.618 0.086 0.531 45.0 

... .00 637 ... 3/8-16 0.376 

Anvil Hole Countersink Press-in 

for for serrations pressure 

Clifa L1 N kN 

M3 

4-40 

M4 

8-32 

M5 

10-24 

M6 

1/4-20 

M8 

5/16-18 

M10 

3/8-16 

0.122 

0.116 

0.161 

0.168 

0.201 

0.22 

0.24 

0.254 

0.319 

0.316 

0.398 

0.379 

0.157 

0.205 

0.252 

0.299 

0.402 

0.402 

9 to 15 

14.5 to 38 

21 to 42 

21 to 50 

21 to 60 

32 to 84 

The press-in pressure F is dependent on the Clifa dimension, the material and the thickness of the shaped component and also the type of 

serration at the head. Excessive force must be avoided. The hole diameter of the part to be screwed on ≈ A+0.024. 


Clifa ® -SA/SAD 


510 to 534 


31

KerbKonus – Close to 

its customers. Around 

the world. Across every 

sector of industry. 

First and foremost, for you customer proximity means a rapid response to 

your requirements and the fast, efficient realization of the right fastening 

solution for you. 

For us, customer proximity is far more than just another phrase - it is 

an important strategic instrument. Our technical sales consultants are 

available locally to talk to you around the world, ready to offer sound 

advise when it comes to the reliable, economical application of modern 

fastening technology. Advisory activities are coordinated through the 

headquarters in Amberg. 

Why not simply call us to arrange an appointment? 


... in Germany 

Amberg Headquarters Production and Sales 

Hadamar 

Kerb-Konus-Vertriebs-GmbH 

Wernher-von-Braun-Straße 7 

92224 Amberg, Germany 

... and around the world. 

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Fasteners Pvt. ltd. Rugeley/Staffordshire 

Kolhapur/India UK 

K.K.V. Corporation Japan Kerb Konus Espanola S.A. 

Osaka/Japan Navalcarnero/Madrid 

Spain 

KKV AG KKV Belgium 

Sattel/Switzerland Gooik/Belgium 

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Somerset, New Jersey/USA 

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Mulazzano/Italy 

VilleneuveD’Ascq 

France 

Other foreign agents in a wide number of countries. 

1010 

Addresses on request or under www.kerbkonus.de 

E12 no. Publication / service 

Precision Fasteners, Inc. 

updating 

24 World’s Fair Drive - Unit D 

the to 

Somerset, New Jersey 08873 

Toll Free No. in USA 0800 447 2077 

subject 

Phone +1 732 627 0032 

not is 

FAX +1 732 627 8424 

eMail info@precisionfastenersinc.com 

publication 

Web www.precisionfastenersinc.com This 

a KKV subsidiary

Machine Ensat® installation - Precision Fasteners Inc.

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