MIL-DTL-38999 Series I connectors are designed for rugged environments with up to 128 contacts in an insert. These connectors, featuring front wall mount, rear wall mount, and jam nut receptacles, offer reliable performance in harsh conditions, with an operating temperature range from -65 °C to 200 °C. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts in various sizes, including coax and twinax options. Constructed with high-strength aluminum shells, they come in a range of plating options, such as light iridescent yellow cadmium and electroless nickel, meeting RoHS compliance standards. Suitable for military and industrial applications, these connectors ensure secure and durable electrical connections.