The MIL-DTL-38999 III (D38999) harsh environment connectors offer reliable connectivity in demanding conditions. Featuring wall mount receptacles, jam nut receptacles, and straight self-locking RFI plugs, they come in 9 shell sizes and 54 insert arrangements. Utilizing M39029 contacts in various sizes, including power and twinax options, these connectors are versatile. Available in aluminum, stainless steel, and lightweight composite shells with plating options like olive drab cadmium and passivated stainless steel, they meet stringent requirements. With RoHS-compliant and Boeing BACC-approved designs, these connectors ensure high performance and durability in military and aerospace applications.