The MIL-DTL-38999 III (D38999) harsh environment connectors offer rugged reliability in various configurations, including wall mount receptacles, jam nut receptacles, and straight self-locking RFI plugs. With options in 9 shell sizes and 54 insert arrangements, they accommodate M39029 contacts in sizes 22D, 20, 16, 12, 10 power, and 8 twinax. Available in aluminum, stainless steel, and lightweight composite shells, with plating choices such as olive drab cadmium, nickel, black zinc nickel, and passivated stainless steel, these connectors meet diverse application needs. Featuring RoHS-compliant and cadmium-free finishes, along with Boeing BACC-approved designs, they ensure high performance in demanding environments.