MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs. With up to 128 contacts in an insert, these connectors offer versatility in connectivity. Operating efficiently in temperatures ranging from -65 °C to 200 °C, they are environmentally sealed for reliable performance. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts in various sizes, including coax and twinax. Constructed with high strength aluminum shells, these connectors come with plating options like light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum. RoHS certified finishes are also available. Perfect for military and industrial applications, these connectors ensure secure and durable electrical connections.