The MIL-DTL-38999 III (D38999) harsh environment connectors offer rugged durability for demanding applications. Featuring wall mount receptacles, jam nut receptacles, and straight self-locking RFI plugs, they come in 9 shell sizes and 54 insert arrangements, accommodating M39029 contacts in various sizes. With options for aluminum, stainless steel, and lightweight composite shells, and plating choices including olive drab cadmium and passivated stainless steel, these connectors meet diverse needs. RoHS-compliant and Boeing BACC-approved versions are available, ensuring compatibility with industry standards. Designed for reliability in extreme conditions, they provide secure connectivity in military, aerospace, and other critical environments.