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 performance. With shell materials including aluminum, stainless steel, and lightweight composite, as well as a range of plating options such as olive drab cadmium and nickel, these connectors offer versatility in demanding applications. RoHS-compliant and Boeing BACC-approved designs are also available, ensuring quality and compliance. Suitable for military, aerospace, and industrial use, the 38999 Series 3 connectors provide reliable connectivity in rugged environments.