MIL-DTL-38999 III (D38999) harsh environment connectors feature a comprehensive range of wall mount receptacles, jam nut receptacles, and straight self-locking RFI plugs. With nine 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 shells, these connectors offer versatility in shell materials and plating options such as olive drab cadmium, nickel, black zinc nickel, and passivated stainless steel. With RoHS-compliant and cadmium-free finishes, as well as Boeing BACC-approved designs, they meet stringent industry standards for reliability in demanding environments.