MIL-DTL-38999 Series I connectors offer reliable connectivity in harsh environments with up to 128 contacts in an insert, operating flawlessly in temperatures ranging from -65 °C to 200 °C. Featuring front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, this connector family ensures versatile application. With 9 shell sizes and 52 insert arrangements, it accommodates various needs, using M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8, including coax and twinax options. The high-strength aluminum shells come in multiple plating options, such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, catering to specific requirements. These connectors, meeting MIL-DTL-38999 I military specifications, guarantee durability and performance in demanding settings, making them ideal for critical applications in the aerospace, defense, and industrial sectors.