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, they utilize M39029 contacts in various sizes, including power and twinax. With options in aluminum, stainless steel, and lightweight composite shells, and a range of plating choices like olive drab cadmium and passivated stainless steel, these connectors offer versatility. RoHS-compliant and Boeing BACC-approved designs cater to diverse requirements. Perfect for demanding applications, they ensure reliable connectivity in challenging environments.