MIL-DTL-38999 Series II connectors offer reliable performance in harsh environments with up to 128 contacts housed in an insert. Designed for rugged applications, these connectors are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. Available in various mounting options such as front wall, rear wall, and jam nut receptacles, they feature thin walls and restricted lengths for efficient connectivity. With a choice of shell sizes and insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. The aluminum shells come with plating options including cadmium and nickel for enhanced durability. Meeting military specifications, these connectors are ideal for aerospace, defense, and other demanding industries.