MIL-DTL-58085C
3.3.1 Standard parts. AN or MS standard parts shall be used whenever they are
suitable for the purpose, and shall be identified on the drawings by their part numbers. In
applications for which no suitable corresponding part is in effect on date of invitation for
bids, commercial parts may be used provided they conform to this specification.
3.3.2 Interchangeability. All parts having the same manufacturer's part number
shall be directly and completely interchangeable with each other with respect to
installation and performance.
3.3.3 Screw threads. Screw threads shall be in accordance with MIL-S-7742.
3.3.4 Protective treatment and finishes. Materials subject to deterioration when
exposed to climatic or environmental conditions during service usage, shall be protected
against deterioration in a manner that will in no way prevent compliance with the
performance requirements specified herein (see 3.5). Protective coating that will chip,
crack, or scale with age or extremes of climatic or environmental conditions shall not be
used.
3.3.4.1 Metals. Metals shall be of the corrosion-resistant type or suitably protected
to resist corrosion during normal service life. Surface treatments and metallic coatings
for metal surfaces of the light shall be in accordance with MIL-S-5002. Unless suitably
protected against electrolytic corrosion, dissimilar metals as defined in MIL-STD-889
shall not be in intimate contact with each other.
3.3.4.2 Aluminum and aluminum-alloy parts. All aluminum and aluminum-alloy
parts shall be covered with an anodic film conforming to MIL-A-8625. If the finish is for
corrosion resistance, or for a paint base, the parts shall be coated with a chemical film in
accordance with class 2 of MIL-DTL-5541.
3.3.4.3 Steel parts. All steel parts, except lubricated internal working parts and
those fabricated from corrosion-resistant steel, shall be cadmium-plated in accordance
with type II, class B of SAE-AMS-QQ-P-416.
3.3.4.4 Painting. Before assembly, all exposed parts (except bearing surfaces and
the lamp) shall be coated with zinc-chromate primer conforming to TT-P-1757; after
assembly, two coats of zinc-chromate primer pigmented conforming to olive drab No.
34088 of FED-STD-595 shall be applied.
3.4 Components. Light shall include the following components:
3.4.1 Cover. Cover shall be of glass and conform to class B of MIL-C-7989.
Cover shall be mounted to provide an unobstructed transmission of light. Light emitted
shall be aviation red conforming to SAE-AS25050.
3.4.2 Housing. Housing shall completely protect the mechanism and electrical
wiring from entrance of foreign matter.
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