MIL-DTL-10392F
1/ 2/
TABLE I. Cord types and construction.
Cord type designation Total
Conductor AWG Conductor
Cord length of lay Cord diameter
number of size
circular
(inch/mm,
(inch/mm,
conductors no. each
mils(nominal)
maximum)
maximum)
WD-27A/U
2
2
24
404
0.5 (12.70)
0.146 (3.71)
WT-15A/U
3
3
24
404
0.5 (12.70)
.212 (5.38)
WF-11A/U
4
4
24
404
.875 (22.23)
.212 (5.38)
WM-59A/U
5
5
24
404
1.125 (28.58)
.212 (5.38)
WM-60A/U
6
6
24
404
1.25 (31.75)
.252 (6.40)
WM-69B/U
6
2,4
18,24
1620,404
.875 (22.23)
.262 (6.65)
WM-111A/U
7
2,5
18,24
1620,404
.875 (22.23)
.280 (7.11)
WM-61A/U
7
7
24
404
1.25 (31.75)
.252 (6.40)
WM-62A/U
8
8
24
404
.625 (15.88)
.262 (6.65)
WM-70B/U
8
2,6
18,24
1620,404
.875 (22.23)
.285 (7.24)
WM-63A/U
9
9
24
404
1.75 (44.45)
.280 (7.11)
WM-64A/U
10
10
24
404
2.25 (57.15)
.297 (7.54)
1/ Dimensions are in inches.
2/ Metric equivalents are given for information only.
3.3 Conductor. The conductor shall be constructed as follows: 0.0003 inch (.01 mm), minus 0.0001
inch (.00 mm). Each strand shall be tinned, annealed, cadmium-copper alloy having a 1% nominal
content of cadmium.
3.3.1 Conductor construction, 404 circular mils. Conductors having a nominal cross-sectional area of
404 circular mils (24 AWG) shall consist of 41 strands, bunch stranded, with a maximum length of lay of
0.6 inch (15.24 mm).
3.3.2 Conductor construction, 1620 circular mils. Conductors having a nominal cross-sectional area
of 1620 circular mils (18 AWG) shall consist of 168 strands, rope lay, consisting of seven bunch-stranded
members. Each bunch stranded member shall contain 24 strands, bunch stranded, with a maximum
length of lay of 0.6 inch (15.24 mm). Six of these members shall be twisted concentrically around one
member, with a maximum length of lay of 0.8 inch (20.32 mm) to form the rope lay conductor.
3.4 Conductor strands. The strands comprising the stranded conductors shall have a cross-sectional
area of 9.61 circular mils (40 AWG). The diameter of the strands shall be 0.0031 inch (.08 mm)
+0.0003 inch (.01 mm), -0.0001 inch (.00 mm). Each strand shall be tinned, annealed, cadmium-copper
alloy having a 1 percent nominal content of cadmium.
3.4.1 Pure tin. The use of pure tin, as an underplate or final finish, is prohibited both internally and
externally. Tin content used in connector materials shall not exceed 97 percent by mass. Tin shall be
alloyed with a minimum of 3 percent lead, by mass (see 6.3).
3
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