The MIL-DTL-38999 Series I connectors are designed for harsh environments, with up to 128 contacts sealed within their inserts. Operating in temperatures ranging from -65 °C to 200 °C, these connectors offer reliable performance in extreme conditions. Available in various shell sizes and insert arrangements, they feature M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8, including coax and twinax options. With front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they provide versatile connectivity solutions. Constructed with high-strength aluminum shells and offering plating options such as cadmium, nickel, and anodized aluminum, these connectors ensure durability and corrosion resistance. Suitable for military and industrial applications, they meet stringent standards for performance and reliability.