The MIL-DTL-38999 Series I connectors boast up to 128 environmentally sealed contacts, designed for harsh environments with a wide operating temperature range from -65 °C to 200 °C. Featuring front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs, this connector family offers versatility. With 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts in various sizes, including coax and twinax. Constructed with high-strength aluminum shells, they come in a range of plating options like cadmium and nickel, with RoHS-certified finishes available. Perfect for military and industrial applications, these connectors ensure reliable performance in demanding conditions.