MIL-DTL-3661D
3.3.3.2 Finishes.
3.3.3.2.1 Exterior. The exterior surfaces, designed to be exposed at the front of the panel after assembly,
shall have a black lusterless finish.
3.3.3.2.2 Aluminum (only). Unless otherwise specified (see 3.2), all external aluminum parts shall be
anodized in accordance with MIL-A-8625 and all internal aluminum parts shall be chemically treated in accordance
with MIL-DTL-5541.
3.3.4 Dissimilar metals. When dissimilar metals are used in intimate contact with each other, protection
against electrolysis and corrosion shall be provided. The use of dissimilar metals in contact, which tend toward
active electrolytic corrosion (particularly brass, copper, or steel used in contact with aluminum or aluminum alloy),
is not acceptable. However, metal plating or metal spraying of dissimilar base metals to provide similar or suitable
abutting surfaces is permitted. The use of dissimilar metals separated by a suitable insulating material is also
permitted. Dissimilar metals are defined in 6.3.
3.3.5 Plastic material (not applicable for lenses). Cotton base laminations, cotton, or cellulose-filled
molding material shall not be used.
3.3.5.1 Thermoplastics. Unless otherwise specified (see 3.2), thermoplastics shall not be used for
fabricating indicator light housings and lampholder bases. When used for internal insulation the thermoplastic
material shall be in accordance with Group 02 of ASTM D4066, or shall be of a high temperature polycarbonate
material which is self-extinguishing when tested in accordance with ASTM D635.
3.3.6 Silicone rubber. Silicone rubber shall be in accordance with A-A-59588 when used as an "O" ring
for external sealing devices.
3.4 Design and construction. Lampholders, indicator lights, indicator-light housings and lenses shall be so
constructed as to insure proper operation when mounted in any position and shall conform to the design,
construction, and physical dimensions as specified (see 3.2).
3.4.1 Mounting hardware. All mounting hardware shall be as specified (see 3.2) and need not be
assembled when being furnished for inclusion in production equipment. For direct Government procurement, all
mounting hardware shall be assembled to the lampholder in the order specified (see 3.2) or, shall be included in the
unit package with the lampholder.
3.4.2 Terminals. The terminal design shall be as specified (see 3.2).
3.4.2.1 Solder terminals (when applicable). Solder terminals shall be designed to accept two wire leads,
AWG #20, per terminal unless otherwise specified (see 3.2) and shall be treated to facilitate soldering.
3.4.2.2 Screw terminals (when applìcable). Screw terminals shall be provided with hardware, as specified
(see 3.2).
3.4.2.3 Terminal identification. Lampholders, indicator lights and indicator-light housings, designed to
accommodate neon lamps, shall be marked with a plus (+) sign at the terminal which is electrically connected to the
center contact of the lamp used.
6
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business