The MIL-DTL-38999 Series I connectors boast a rugged design suitable for harsh environments, featuring up to 128 contacts housed in an insert. With front wall mount, rear wall mount, and jam nut receptacles, they offer versatility in installation. These connectors, compliant with military specification MIL-DTL-38999 I, ensure reliable performance in extreme conditions, with an operating temperature range spanning from -65 °C to 200 °C. Utilizing M39029 rear release crimp contacts, they guarantee secure connections in sizes 22D, 22M, 22, 20, 16, and 8, including coax and twinax options. Crafted from high-strength aluminum shells and available in various plating options, such as electroless nickel and cadmium-free finishes, they prioritize durability and environmental protection. Suitable for back panel box mounting with a bayonet coupling, these connectors are essential for applications demanding robust connectivity solutions.