MIL-DTL-55021/1D
TABLE I. Length of lay.
Wire size range
Twist tolerance
Inches per twist
(inch)
(AWG)
±.5
32 to 24
2.0
±.5
22 to 18
2.5
±.5
16 to 14
3.5
±.5
12 to 10
4.5
±.5
8 to 6
5.5
±.5
4 to 1/0
6.0
Jacket materials: If jacketing is required by the contract or order (see MIL-DTL-55021), the jacket
materials shall be polyvinyl chloride or polyamide.
Jacket wall thickness: The jacket wall thickness shall be specified in table II or table III. When a
polyamide jacket of greater than .250 inches is specified, a polyamide braid conforming to MIL-C-572
shall be used.
TABLE II. Polyvinyl chloride jacket thickness.
1/
Diameter over braided shield
Jacket thickness (nominal)
Jacket thickness
(inch)
(inch)
(minimum) (inch)
Under .375
.016
.008
.375 and over
.025
.015
1/ When specifying a jacket thickness, both unshielded and shielded constructions are applicable.
TABLE III. Polyamide jacket thickness.
1/
Diameter over braided shield
Jacket thickness (nominal)
Jacket thickness (minimum)
(inch)
(inch)
(inch)
Under .200
.006
.004
.200 and over
.008
.006
1/ When specifying a jacket thickness, both unshielded and shielded constructions are applicable.
Heat resistance: The cable shall be conditioned at 105±5 C for 96+1, -0 hours.
o
Changes from previous issue. Marginal notations are not used in this revision to identify changes with
respect to the previous issues due to the extensiveness of the changes.
Referenced documents. In addition to MIL-DTL-55021, this document references the following:
MIL-C-572
MIL-DTL-16878/1
MIL-DTL-16878/2
MIL-DTL-16878/3
MIL-DTL-16878/17
MIL-DTL-16878/18
MIL-DTL-16878/19
2
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