"lfk f; \"A Lt. - Airborne Systems

Sewing Threads. Threads and cords fer machine
and hand sawing are avail3ble in many constructions
and sizes in cotton, ny'l Dr . polyester , Nomex and
Kevlar Hrarnid. Characteristics of sewing threads de.
fined by govern men: specifications are given in Tob'
2 thioUQh 4. 6. Listed properties of minimum breaking
strcng:h, maximum weigllt in terms of minimum
length per pound, ply ond minillun final twist where
noted are specified limi: values. A class of thread
uSLIally identifies more than one limit of breaking
Note: The following statements apply in general ro the tables of textile characteris\ics throughout this chapt
design point, the result will generallY result in
Although safe practice dictates use of the specification minimum strength as the
an over-designed component with more weight and bulk than is necessary to meet minimum requirements.
Specification for manufacture of nylon cloth , ribbons , tape , webbing, cords and thre!ld os:1 for yarn that is a bright. high ten.
or its derivatives
acity, light and heat resistant, polyamide prepared from hexamethylene diamine and adipic acid Invlon 6.6)
and the yarn shall not be bleached in soy manner or process.
half inch of water unless otherwise noted.
Air permeabiliW of cloth is determined at a pressure differential equivalent to one.
limit in weight is intended, and so must be
Weight is given in terms of length per pound for threads or cords. The maximum
represented by G minimum limit for length in accordance with the simplified practice of measuring, used by the textile trade.
TABLE 4. COTTON SEWING THREADS
Data fram V. 276, Reference 233
Type Size Min. Min. Ply Type SI2e Min. Min.
Break Length B rea k length
(ticket) Str. per Lb. (ticket! 8tr. per Lb.
(number) (Ibs) (Vds) (number! (Ibs) (yds)
I A&. 140 00C
1 7,946
065
1 C 1C,281
216
761
010
500
IIA 531
13,441
15, 120
081
401
III A&B
10.
601
001
831
6,441 11. 501
040 901
836
9 ,406
12.5
15.
501
275
3.2
536
276'
721
041
881
811
IV A&B
601
221
001
871
761
676
14,40:
611
11,001
551
000 1 7 15.521
12,271
501
.. M de from high grade cotton
.." Long staple cotton yarn, S :wist
Type Machine Thread A-soft finish: g1azed; mercErized
II: Basting Tr,read A-glazed
III. Heavy Thread: A. -soft. 8.glazed
IV: Shoe T ilread: A.soft; B-glazed
COIOf May be specified
Use: Sewing cot:on mstefl?Jls
155
PIV