MIL-DTL-24643C
3.3.5 Glass braids. Glass braids for use on extruded silicone rubber insulation shall have a thickness of
0.006±0.0005 inch. The braid angle shall be such that the completed cable shall meet all inspection and test
requirements.
3.3.6 Covering. The covering shall consist of a layer or layers of a halogen-free material that provides high
resistance to moisture, abrasion, hydraulic fluids, and provide a smooth surface for printed identification marking.
The surface shall be smooth and free from irregularities and discontinuities.
3.3.6.1 Jackets. The material used for jackets over insulated conductors and groups of insulated conductors,
and for the cable jacket, shall have the physical and electrical properties as required by the applicable specification
sheet and as specified herein. The color of the cable jacket shall be black, white, or red, as specified (see 6.2).
3.3.7 Shields. The materials and constructions for shields of insulated conductors, groups of insulated
conductors, and overall cable shall be as specified in the specification sheet. When AWG sizes are specified for
wire shields, they shall be in accordance with ASTM B258.
3.3.8 Fillers. Unless otherwise specified in the applicable specification sheet, fillers for cables of the
flex/bending type intended for flexing applications, only fibrous fillers shall be used. For non-flexing types, solid or
fibrous filler materials shall be acceptable.
3.3.8.1 Fibrous fillers. Fibrous fillers shall be treated for flame or moisture resistance, or a combination of
both, to meet the requirements for the particular type of cable.
3.3.8.2 Nonfibrous fillers (solids). Nonfibrous fillers shall consist of elastomeric material which is removable
from insulation of conductors and insulating coverings over the shields without the use of chemicals or tools.
3.3.9 Water-blocking materials (watertight). Water-blocking materials used in cable and shield interstices shall
be compatible with all other cable materials. The materials shall be clean, non-tacky to the touch, and shall leave no
residue on the installer's hands. The materials shall be free stripping from the cable components and shield by hand
and shall not require the use of chemicals or other mechanical means of removal. The materials shall not interfere
with any termination technique used with finished cable, shields, or components. The compatibility of the materials
3.3.9.1 Water-swelling fillers (watertight). Water-swelling fillers used to water-block cable voids and shield
interstices shall be compatible with all other cable materials. The fillers shall be clean and non-tacky to the touch.
They shall be readily removable from the cable components and shields. The fillers shall not interfere with any
termination technique used with finished cable, shields, or components. Cables manufactured with these types of
fillers must be tested for water-tightness in accordance with 4.8.23 with seawater in accordance with ASTM D1141,
and shall pass the limits for allowable water-leakage in accordance with table XIII.
3.3.10 Tapes. Tapes shall be of a material compatible with the other cable materials. The compatibility of the
material shall be in accordance with 4.8.7 and 4.8.8. For cable constructions not using water-swelling tapes, the tape
material shall be halogen-free. Polyester tapes shall be in accordance with MIL-I-631. Tapes applied over shield
braids for singles, twisted pairs, and triads, shall be sealed or set to prevent unwinding freely, but shall be easily
removable for wire and/or shield termination.
3.3.10.1 Water-swelling tapes (watertight). Water-swelling tapes used to water-block cable voids and shield
interstices shall be compatible with all other cable materials. The tapes shall be clean and non-tacky to the touch.
They shall be readily removable from the cable components and shields. The tapes shall not interfere with any
termination technique used with finished cable, shields, or components. Cables manufactured with these types of
tapes must be tested for water-tightness in accordance with 4.8.23 with seawater in accordance with ASTM D1141,
and shall pass the limits for allowable water-leakage in accordance with table XIII.
3.3.11 Braids.
3.3.11.1 Braids identification. Colored braids used for conductor or group identification shall be in accordance
with MIL-C-572.
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