MIL-DTL-38999 Series I connectors feature up to 128 contacts within an environmentally sealed insert, designed for rugged applications with an operating temperature range of -65 °C to 200 °C. Available in various configurations including front and rear wall mount, jam nut receptacles, and RFI grounding plugs, they meet stringent military specifications. With 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8, including coax and twinax options. Constructed with high-strength aluminum shells, they offer a range of plating options such as cadmium and nickel finishes, catering to diverse environmental needs. Meeting RoHS compliance standards, these connectors ensure reliable performance in demanding environments.