MIL-DTL-38999 Series I connectors feature up to 128 contacts within an insert, designed for harsh environments with operating temperatures ranging from -65 °C to 200 °C. Offering front wall mount, rear wall mount, and jam nut receptacles, this connector family includes RFI grounding plugs and utilizes M39029 rear release crimp contacts in various sizes. Constructed with high-strength aluminum shells, they come in 9 shell sizes and 52 insert arrangements, plated with options like light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, with RoHS certified cadmium-free finishes available. The connectors, compliant with MIL-DTL-38999 I military specifications, ensure reliable performance in demanding applications.