Fittings in accordance with MIL-DTL-5070.
Specifications for Fittings
Material: Aluminum and steel in accordance with Table I of MIL-DTL-5070. Sizes 3-6 are steel. Sizes 8-32 are all aluminum.
Finish: Aluminum Alloy, anodized in accordance with MIL-A-8625, Type II, Class 2. Steel, cadmium plated (zinc plating option per ASTM B633 Type II, Fe/Zn 5) per SAE-AMS-QQ-P-416, Type II, Class II.