MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert with front wall mount, rear wall mount, and jam nut receptacles. Operating in temperatures ranging from -65°C to 200°C, these connectors are environmentally sealed for reliable performance. They utilize M39029 rear release crimp contacts in various sizes, including coax and twinax. With options of gold plating and finishes such as electroless nickel and cadmium olive drab, they offer durability and conductivity. Compliant with military specification MIL-DTL-38999 I, these connectors are ideal for applications requiring rugged and reliable connectivity.