MIL-DTL-38999 Series I connectors feature a rugged design with up to 128 contacts in an insert, offering reliable connectivity in harsh environments. These connectors, with front wall mount, rear wall mount, and jam nut receptacles, are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. Utilizing M39029 rear release crimp contacts, they come in various sizes and insert arrangements, including sizes 22D, 22M, 22, 20, 16, and 8 for coax and twinax applications. Constructed with high strength aluminum shells and available in different plating options like cadmium and nickel, they ensure durability and performance. Suitable for military and industrial applications, these connectors meet stringent standards for reliability and quality.