MIL-DTL-38999 Series I connectors boast up to 128 contacts, offering exceptional environmental sealing and a wide operating temperature range from -65 °C to 200 °C. This harsh environment connector family features 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, including coax and twinax options. Crafted from high strength aluminum shells, they come with a choice of plating finishes like light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, with RoHS certified cadmium-free options also offered. Ideal for military and industrial applications, MIL-DTL-38999 Series I connectors provide reliable performance in demanding environments.