The MIL-DTL-38999 III (D38999) harsh environment connectors feature wall mount receptacles, jam nut receptacles, and straight self-locking RFI plugs. With 9 shell sizes and 54 insert arrangements, they accommodate M39029 contacts in various sizes, including 22D, 20, 16, 12, 10 power, and 8 twinax. Available in aluminum, stainless steel, and lightweight composite materials, these connectors offer a range of plating options such as olive drab cadmium, nickel, black zinc nickel, and passivated stainless steel. They also include RoHS-compliant and cadmium-free finishes, meeting Boeing BACC standards. Designed for rugged military applications, they ensure reliable performance in extreme conditions.