MIL-DTL-38999 Series I connectors, part of the harsh environment connector family, feature front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs. With up to 128 contacts in an insert, these connectors are environmentally sealed and designed for rugged applications. Operating in temperatures ranging from -65 °C to 200 °C, they offer reliability in extreme conditions. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts, including sizes 22D, 22M, 22, 20, 16, and 8. Constructed with high-strength aluminum shells, they come in various plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum. These connectors are ideal for military and industrial use, meeting MIL-DTL-38999 I specifications and offering durable performance with RoHS certified cadmium-free finishes.