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 options in aluminum, stainless steel, and lightweight composite, and plating choices including olive drab cadmium, nickel, black zinc nickel, and passivated stainless steel, these connectors offer versatility. RoHS-compliant and Boeing BACC-approved designs ensure quality and compliance. Suitable for demanding applications, they provide reliable performance in rugged environments.