MIL-DTL-38999 III (D38999) harsh environment connectors offer reliable performance in demanding conditions. This series includes wall mount receptacles, jam nut receptacles, and straight self-locking RFI plugs, with options for various shell sizes and insert arrangements. Utilizing M39029 contacts, they cater to sizes 22D, 20, 16, 12, 10 power, and 8 twinax. Available in aluminum, stainless steel, and lightweight composite shells, with plating choices like olive drab cadmium, nickel, black zinc nickel, and passivated stainless steel. Offering RoHS-compliant and cadmium-free finishes, as well as Boeing BACC-approved designs, these connectors ensure high-quality performance for military and industrial applications.