The MIL-DTL-38999 III (D38999) harsh environment connectors feature wall mount receptacles, jam nut receptacles, and straight self-locking RFI plugs, available in 9 shell sizes and 54 insert arrangements. Utilizing M39029 contacts in various sizes, including power and twinax options, these connectors offer versatility in design. With shell materials ranging from aluminum to stainless steel and lightweight composite, and plating options like olive drab cadmium, nickel, and black zinc nickel, they cater to diverse industrial needs. RoHS-compliant and Boeing BACC-approved designs ensure quality and compliance, making them ideal for demanding applications.