MIL-DTL-38999 III (D38999) harsh environment connectors are designed for rugged applications, featuring wall mount receptacles, jam nut receptacles, and straight self-locking RFI plugs. With 9 shell sizes and 54 insert arrangements available, they offer versatility in connectivity solutions. Utilizing M39029 contacts in various sizes, including 22D, 20, 16, 12, 10 power, and 8 twinax, these connectors ensure reliable signal transmission. Constructed from durable shell materials such as aluminum, stainless steel, and lightweight composite, they provide robust performance. With a wide range of plating options, including olive drab cadmium, nickel, black zinc nickel, and passivated stainless steel, they offer enhanced corrosion resistance. Boasting RoHS-compliant and cadmium-free finishes, as well as Boeing BACC-approved designs, these connectors are suitable for high-reliability applications.