The MIL-DTL-38999 III (D38999) harsh environment connectors are designed for rugged applications, featuring wall mount receptacles, jam nut receptacles, and straight self-locking RFI plugs. Available in 9 shell sizes and 54 insert arrangements with M39029 contacts ranging from size 22D to 8 twinax, these connectors offer versatility. Constructed from aluminum, stainless steel, or lightweight composite materials, they come in various plating options including olive drab cadmium, nickel, and black zinc nickel. With RoHS-compliant and cadmium-free finishes, as well as Boeing BACC-approved designs, they meet stringent industry standards. Perfect for military and industrial use, these connectors ensure reliable performance in demanding environments.