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 for optimal connectivity. With options in aluminum, stainless steel, or lightweight composite shells, and a range of plating choices including olive drab cadmium, nickel, black zinc nickel, and passivated stainless steel, these connectors offer versatility. Compliant with RoHS standards and Boeing BACC-approved designs, they ensure high-performance in demanding applications. Perfect for military and aerospace use, these connectors provide reliable and durable connections in extreme conditions.