UPD - Machine Accessories Corporation

Thread Dimensions
Nominal Dimensions of Standard Threads
Pipe
o.D. NPT NPSH NPSM NH BSPP
(NST) (Parallel)
stze TPI TPI ODM IDF TPI ODM IDF TPI ODM IDF TPIODM IDF
(Max)(min)
,max,(min)
(max) (min) (max)(min)
1/8" .405 27
27 3.3970.358
0.383
1t4" .504
'18
18 0.526 0.468
0.5160.450
3/8" .675 18
18 0.662 0.603
0.656 0.588
1t2', .840 14 14 o.82440.7395
0.823 0.747
0.825 0.733
3t4" 1.050 14 1.03530.950014
1.0340.958 8 1375 1.2246 o41 0.950
1" 1.315
'11.51l5
295I 1 192l 1 293 1.201 8 1.3751.2246
11 1.309 I 93
1-114', 1.660 11.5 11.51.63991.53691l5
1638
1.U6
1.6501.534
1-1t2',
'1.90011.511.51.87881.7758115
1.8B71.785
I 1.990 1.8577 11 1.882 1.766
2" 2.375 11.5 1152 3528 2.249811.5 2.J71 2.259
2.347 z.2J l
2,1t2' 2.475 8
I 2.841 2.708 7.5 3.068 2.9104 11 2.960 2.844
3" 3.500 I
8 3.467 3.334 6 3.623 11 3460
3.344
4" 4.500 8
I 4.466 4.333 4 5.0104.7111
1l 4.450 4.334
4,1t2'
5.760 5.461'1
5 9602
6.7252
5
I
5.524 4 a 26u
6 6.625 8
I 6.585 6.452 7.025
8" 8.625 8
10' 10.750 8
12" 12.750 8
ODM - Outside Diameter of the Male IDF - lnside Diameler ol the Female
GHT (3/4)- 1.062s oDM,11 112rPl
NOTE: F€male NPT (Tapered Pipe) thread is not
'll
1I
5.450 5.359
6.4506.359
BSPTT
(Tapered)
TPI
2A
19
19
14
14
11
11
11
11
11
11
11
1l
11
TPI - Threads Per Inch
available on hose swivel nuts.
Normal Engagement Length of NPT Thread in Inches ("Ae)*
1i8' 3/8" 1t2" 314" 1 1t2"
ne 2" 2-112" 3" 5 6' 8" '10" 12'
3t4" 15/16" l -1t8" 1-1t4"1-5/16'1-7 t16" 1-5/8" 1-314"
3/8" 3/8" 112"9/16" I1/10',
' Dimensions given do not allow for variations ln tapping or threading
Cam & Groove Nominal Take-up Lengths
209