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Military Specification Polyester Thread – Physical Characteristics (A-A-59963; Supersedes MIL-DTL-32072)

Types:
I — Twisted soft multiple cord
II — Twisted bonded multiple cord
III — Bonded monocord
IV — Soft air entangled
V — Bonded air entangled
Classes:
Class 1 — Normal elongation
Class 3 — Heat stable — low shrinkage
Subclasses:
Subclass A – General purpose
Subclass B – Nonwicking finish
Subclass C – No finish
TABLE I. Type I Class 1 Thread Requirements

Tex size

Breaking Strength LBS.

Elongation % Max

16 1.4 26
24 2.0 26
30 3.0 26
45 4.3 26
70 8.0 26
90 10.6 26
135 16.0 26
210 24 26
270 32 26
350 40 26
400 48 26
450 54 26
500 60 26
700 70 26

TABLE II. Type I Class 3 Thread Requirements

Tex size

Breaking Strength LBS.

Elongation % MIN

Elongation % MAX

16 1.25 15 35
24 1.90 15 35
30 3.80 15 35
45 6.80 15 35
70 7.60 15 35
90 16.00 15 35
210 19.00 15 35
270 27.25 15 35
350 34.00 15 35
400 41.00 15 35
450 47.70 15 35

TABLE III. Type II Class 1 Thread Requirements

Tex size

Breaking Strength LBS.

Elongation % Max

16 1.5 26
24 2.3 26
30 3.0 26
45 4.5 26
70 8.0 26
90 10.6 26
135 16.0 26
210 25 26
270 34 26
350 42 26
400 48 26
450 54 26
500 60 26
700 70 26

TABLE IV. Type III Class 1 Thread Requirements

Tex size

Breaking Strength LBS.

Elongation % Max

16 1.4 26
24 2.6 26
30 3.0 26
45 5.3 26
70 8.0 26
90 10.6 26
135 16 26
210 24 26
270 32 26
350 40 26
400 48 26
450 54 26
500 60 26
700 70 26

TABLE V. Type IV, Soft Air Entangled Thread Requirements

Tex size

Breaking Strength LBS.

Elongation % Max

16 1.0 26
21 1.4 26
24 1.6 26
27 1.8 26
30 2.0 26
40 2.8 26
50 3.6 26
60 4.3 26
80 5.4 26
90 5.9 26
105 6.9 26

TABLE V. Type VI, Bonded Entangled Thread Requirements

Tex size

Breaking Strength LBS.

Elongation % Max

16 1.0 26
21 1.4 26
24 1.6 26
27 1.8 26
30 2.0 26
40 2.8 26
50 3.6 26
60 4.3 26
80 5.4 26
90 5.9 26
105 6.9 26

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