MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With front wall mount, rear wall mount, and jam nut receptacle options, they offer versatility in applications. These connectors are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. Utilizing M39029 rear release crimp contacts, they ensure secure connections in various sizes, including 22D, 22M, 22, 20, 16, and 8. The high strength aluminum shells come in nine sizes, with plating options such as iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, catering to diverse needs. RoHS certified cadmium-free finishes are also available. Suitable for military specifications, these connectors offer reliability with their bayonet coupling and socket contact style, making them ideal for environment resistant applications.