The MIL-DTL-38999 III (D38999) harsh environment connectors feature wall mount receptacles, jam nut receptacles, and straight self-locking RFI plugs. Available in 9 shell sizes and 54 insert arrangements, they utilize M39029 contacts in various sizes for reliable connectivity. With options in aluminum, stainless steel, and lightweight composite shells, and platings like olive drab cadmium, nickel, and black zinc nickel, these connectors offer versatility in design. RoHS-compliant and Boeing BACC-approved versions are also available, ensuring compatibility with industry standards. Suitable for demanding applications, these connectors guarantee secure and durable performance in rugged environments.