MIL-DTL-38999 Series I connectors offer robust connectivity with up to 128 contacts, featuring environmental sealing and a wide operating temperature range from -65°C to 200°C. This harsh environment connector family includes front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs, catering to diverse installation needs. With 9 shell sizes and 52 insert arrangements available, these connectors utilize M39029 rear release crimp contacts in various sizes, ensuring compatibility with different wire gauges. Constructed with high-strength aluminum shells and offering a choice of plating options, including cadmium-free finishes, they meet stringent military specifications for performance and durability. The connectors, designed for box mounting, boast bayonet coupling for secure connections and are rated for service in demanding environments.