MIL-DTL-25971C
3.5.8 Sand and dust. When tested as specified in 4.4.6.4, there shall be no evidence of
damage and the light shall operate satisfactorily at the conclusion of the test.
3.5.9 Transformer temperature rise. When tested as specified in 4.4.7, the temperature
rise shall not exceed 65 ºC, and there shall be no damage to the transformer.
3.5.10 Transformer individual. When tested as specified in 4.4.8, the insulation
resistance shall be not less than 30 megohms, and the output voltage shall be 7 + 0.1V.
3.6 Interchangeability. All parts having the same manufacturer's part number shall be
functionally and dimensionally interchangeable. The drawing number requirements of
ASME Y14.100 shall govern the changes in the manufacturer's part numbers.
3.7 Dimensions. The overall length of the housing shall not exceed 15 inches and the
diameter shall not exceed 9 inches. The overall height, from top of the housing to the bottom of
the pistol grip, shall not exceed 16-1/2 inches
3.8 Weight. The weight of the light, without leads and transformer, shall not exceed 8
pounds.
3.9 Finishes and protective coatings.
3.9.1 Corrosion protection. Unless fabricated from corrosion-resistant material, all metal
parts shall be protected against corrosion with a type I finish conforming to MIL-DTL-14072.
The following finishes shall be provided.
3.9.2 Housing exterior. The exterior surface of the housing shall be finished with
powder coating conforming to MIL-PRF-24712, type 1, class 2, color No. 37038 black.
3.9.3 Housing, interior and supporting parts. The interior area of the housing and metal
parts supporting the lamp and auxiliary reflector shall be finished with lusterless black enamel
conforming to MIL-DTL-14072, type I, film designation B.
3.10 Operation markings. An instruction plate shall be permanently attached to the
outside of the housing. Brief instructions on the lamp to be used, method of changing color of
the signal light, method of aiming, etc, shall be permanently and legibly printed on the plate.
3.11 Identification of product. Equipment, assemblies, and parts shall be marked for
identification in accordance with MIL-STD-130.
3.12 Workmanship. The light assembly, including all parts and accessories, shall be
fabricated and finished in a workmanlike manner. Particular attention shall be given to freedom
from blemishes, defects, burrs, and sharp edges; accuracy of dimensions, radii of fillets, and
marking of parts and assemblies; thoroughness of soldering, welding, brazing, painting, wiring,
and riveting; alignment of parts and tightness of assembly screws and bolts, etc.
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