MIL-DTL-55116D
3.3.3.3 Bend relief spring. The bend relief spring shall be fabricated using steel, corrosion-resisting
wire, form I, condition B, composition 302, in accordance with ASTM A313. Finish with chemical
blackening process, class 3 or class 4, in accordance with MIL-DTL-13924.
3.3.3.4 Finish protective. Finish on the exposed surfaces of aluminum or aluminum alloy parts shall be
dyed black finish E-511 in accordance with MIL-DTL-14072. Stainless steel shall be light sand blast,
finish type E300 in accordance with MIL-DTL-14072.
3.3.3.5 Tinsel cord. Tinsel cord shall be in accordance with figure 2.
3.4 Design and construction. Connectors shall be of the design, construction, and physical dimensions
specified (see 3.1).
3.4.1 Threaded parts. Unless otherwise specified (see 3.1), all threaded parts shall be in accordance
with FED-STD-H28.
3.4.2 Casting and molded parts.
3.4.2.1 Casting. Castings shall be of uniform quality and conditions, and free from harmful cracks,
shrinkage, porosity, gas holes, foreign matter and other injurious defects. The surface of the castings
shall be free from pits, parting lines, porous areas, fins, ridges, modules, raised metal and scale. All
castings shall be completely cleaned prior to presentation for inspection. Castings shall not be plugged or
welded, nor shall imperfections be filled in.
3.4.2.2 Molded parts. Molded parts shall be uniform in quality, condition and color. The molded parts
shall be clean, smooth, free from porous areas, foreign materials, weak sections, bubbles, flash and any
other injurious defects.
3.4.3 Cleaning.
3.4.3.1 Parts. After fabrication, parts shall be cleaned in accordance with good commercial practice, or
as specified in an applicable document. Cleaning processes shall have no deleterious effect. Corrosive
material shall be removed completely before the parts are assembled.
3.4.3.2 Connectors. After assembly, connectors shall be cleaned and shall be free from foreign
material.
3.4.4 Alignment dot. Alignment dot(s) shall be a depression filled with orange epoxy paint.
3.5 Electrical.
3.5.1 Dielectric withstanding voltage. There shall be no arcing or dielectric breakdown when the
connectors are tested in accordance with 4.7.1.
3.5.2 Insulation resistance. When tested in accordance with 4.7.2, the insulation shall be not less than
1,000 megohm, except for unmated connectors following the immersion test, when it shall not be less
than 100 megohms.
3.5.3 Contact resistance. The electrical resistance of each non-rigid contact shall be such that the
terminal-to-terminal resistance of mated connector contacts shall not exceed 0.050 ohm (see 4.7.3).
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