MIL-DTL-38999 III (D38999) harsh environment connectors offer rugged reliability for demanding applications. Available in various configurations including wall mount receptacles, jam nut receptacles, and straight self-locking RFI plugs, they provide versatility in connectivity solutions. With 54 insert arrangements and M39029 contacts in sizes 22D, 20, 16, 12, 10 power, and 8 twinax, these connectors ensure compatibility with a wide range of systems. Constructed in 9 shell sizes with options in aluminum, stainless steel, and lightweight composite materials, they cater to diverse needs. Plating choices such as olive drab cadmium, nickel, black zinc nickel, and passivated stainless steel offer durability and corrosion resistance. Whether needing RoHS-compliant, cadmium-free finishes or Boeing BACC-approved designs, users can select the appropriate variant. The MIL-DTL-38999/26 series features a straight plug design with 13 removable crimp contacts, meeting stringent military specifications for performance in extreme conditions. Gold contact plating ensures reliable signal transmission, even in harsh environments with temperatures ranging from -65°C to 175°C. Threaded mating type and C-keyway polarization provide secure connections, while the conductive shell and socket contact style maintain optimal conductivity. With a service rating of M, these connectors are designed for rugged applications, offering 500 mating cycles and environmental resistance.