The MIL-DTL-38999 III (D38999) harsh environment connectors offer rugged reliability for demanding applications. Available in wall mount receptacles, jam nut receptacles, and straight self-locking RFI plugs, they come in 9 shell sizes and 54 insert arrangements. Utilizing M39029 contacts in various sizes, including power and twinax options, these connectors ensure secure connections. With shell materials like aluminum, stainless steel, and lightweight composite, and plating options such as olive drab cadmium and passivated stainless steel, they cater to diverse needs. RoHS-compliant finishes and Boeing BACC-approved designs are also available, making them suitable for a wide range of industries.