The MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts housed in a durable insert. Designed for harsh environments, these connectors are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. Featuring front wall mount, rear wall mount, and jam nut receptacles, they provide versatile installation options. Utilizing M39029 rear release crimp contacts, these connectors come in various sizes, including 22D, 22M, 22, 20, 16, and 8 for different contact arrangements. Constructed with high strength aluminum shells and available in a range of plating options like cadmium and nickel, they ensure reliable performance in demanding conditions. The RoHS compliant versions offer cadmium-free finishes, making them environmentally friendly choices for critical applications.