MIL-DTL-55036C
3.1.8 Core wrap. The core shall be covered with an approved 0.001 inch (.0254 mm) polyethylene
terephtalate tape, type G, forms F or Tf, class I, in accordance with MIL-I- 631. The tape shall be applied
helically with an overlap to provide at least 2 thicknesses of material over the core (see 4.6.8).
3.1.9 Inner jacket. An inner jacket comprised of a tight fitting polyethylene compound, type I, class A,
category 5, grade E4 or E5 as specified in ASTM D1248 shall be applied over the core wrap. Minimum
wall thickness shall be not less than 0.014 inch (.36 mm) (see 4.6.9).
3.1.10 Braid. A galvanized steel braid shall be applied over the inner jacket. The braid shall consist of
16 carriers, 2 ends per carrier, 0.0126+0.0005 inch (.320+.013 mm) wire applied with 2.33+ 0.5 picks per
inch; or 24 carriers, 2 ends per carrier, 0.010+0.0005 inch (.254+.013 mm) wire applied with 3.50+0.50
picks per inch; or 32 carriers, single end per carrier, 0.0126+0.0005 inch (.320+.013 mm) wire applied
with 4.67+ 0.50 picks per inch. Tensile strength, type, weight and uniformity of coating shall be as
specified in 3.1.1.1.1. Loose strands in the braid are not permitted. Joints in steel strands shall be
welded or brazed. A brazed or welded joint shall be the same diameter as the original strand. Dressing
of joints or removal of burrs is acceptable to meet these requirements. Welded joints shall be annealed to
remove any brittleness. Joints in steel strands shall have an average tensile strength of not less than 35
percent of the average tensile strength of the strands adjacent to the joints, when tested on not less than
12 samples. Joints in the steel strands of the braid shall be so staggered so o detrimental effects on the
flexing and tensile properties of the cable. Steel strands that break during the braiding operation may be
repaired. This may be accomplished by trimming and then soldering the loose ends to wires running
parallel to themselves. A lead-tin alloy solder, a noncorrosive flux, and a fine soldering iron may be used.
The length of the soldered section shall be not than .250 inch (6.35 mm). The free ends shall be trimmed
flush so that no free ends exist. The soldered joint shall be dressed down with a file or other suitable
means so that no appreciable increase in braid diameter nor a decrease in jacket thickness develops (see
4.6.10).
3.1.11 Outer jacket. A tightly fitting, seamless jacket of black, low temperature polyvinylchloride
jacketing compound such as B.F. Goodrich GEON 8677, Bakelite Compound QFD-9924 or QFD-9975,
Union Carbide W919, or equal, shall be applied over the braid. The jacketing compound shall fill the
interstices of the braid. The nominal thickness shall be 0.047 inch (1.19 mm) and the minimum thickness
shall be not less than 0.042 inch (1.07 mm). The diameter of the finished cable shall be not greater than
0.625 inch (1.586 mm) and not less than 0.600 inch (15.24 mm) (see 4.6.11).
3.1.11.1 Tubing requirement of jacket. To determine whether the extrusion process has caused strains
in the jacket, a specimen of the cable shall be subjected to the test specified in 4.6.11.1. The jacket shall
show no evidence of cracking when examined under a magnifying glass of approximately 3 diameters
magnification (focal distance 8 cm).
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