The MIL-DTL-38999 III (D38999) harsh environment connectors are designed for rugged applications, offering reliable performance in demanding conditions. This series includes wall mount receptacles, jam nut receptacles, and straight self-locking RFI plugs in various shell sizes and insert arrangements. Utilizing M39029 contacts, they ensure secure connections with sizes ranging from 22D to 8 twinax. Available in aluminum, stainless steel, and lightweight composite shells, with plating options like olive drab cadmium and nickel, they meet diverse needs. RoHS-compliant and Boeing BACC-approved versions are also offered, making them suitable for a range of industries requiring durable and high-quality connectors.