MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in a rugged insert design. These environmentally sealed connectors are built for harsh environments, operating reliably 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, they provide versatile installation options. With 9 shell sizes and 52 insert arrangements available, they accommodate various connectivity needs. Utilizing M39029 rear release crimp contacts, including sizes 22D, 22M, 22, 20, 16, and 8 for coax and twinax, these connectors ensure secure and efficient connections. The high strength aluminum shells come in a range of plating options, from light iridescent yellow cadmium to black anodized aluminum, with RoHS certified cadmium-free finishes available. Designed to meet MIL-DTL-38999 I military specification standards, these connectors are ideal for demanding applications requiring reliable performance in challenging environments.