MIL-DTL-38999 III (D38999) harsh environment connectors are rugged and versatile, featuring wall mount receptacles, jam nut receptacles, and straight self-locking RFI plugs. Available in 9 shell sizes and 54 insert arrangements, they accommodate M39029 contacts in various sizes for optimal connectivity. With shell materials including aluminum, stainless steel, and lightweight composite, and plating options like olive drab cadmium and passivated stainless steel, these connectors offer durability and corrosion resistance. RoHS-compliant and Boeing BACC-approved designs ensure quality and compliance. Suitable for demanding applications, these connectors provide reliable performance in extreme environments.