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 shell materials including aluminum, stainless steel, and lightweight composite, and a range of plating options like olive drab cadmium, nickel, and black zinc nickel, these connectors offer versatility in design. They comply with RoHS standards and Boeing BACC approvals, ensuring quality and performance in demanding applications. Perfect for military and aerospace use, these connectors provide reliable and durable electrical connections in extreme environments.