MIL-DTL-38999 III (D38999) harsh environment connectors, featuring wall mount receptacles, jam nut receptacles, and straight self-locking RFI plugs, provide reliable electrical connections in demanding conditions. With 9 shell sizes and 54 insert arrangements available, along with M39029 contacts in various sizes including 22D, 20, and 16, these connectors offer versatility for different applications. Constructed from durable materials such as aluminum, stainless steel, and lightweight composite, and with a range of plating options including olive drab cadmium and nickel, they ensure corrosion resistance and longevity. Meeting military specification MIL-DTL-38999 III, these connectors are suitable for use in aerospace, defense, and other high-reliability applications, with RoHS-compliant and Boeing BACC-approved designs available.