The MIL-DTL-38999 Series I connectors boast up to 128 contacts within an environmentally sealed insert, designed for rugged applications with an impressive operating temperature range of -65°C to 200°C. Featuring front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they offer versatility in installation. Available in 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts in various sizes, including coax and twinax options. Constructed with high-strength aluminum shells, they come with a choice of plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, catering to different environmental requirements. With RoHS certified cadmium-free finishes available, the MIL-DTL-38999 I connectors are reliable solutions for demanding environments, ensuring connectivity with durability.