MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert with front wall mount, rear wall mount, and jam nut receptacles. These connectors, compliant with military specification MIL-DTL-38999 I, offer reliable performance in extreme conditions, with an operating temperature range of -65 °C to 200 °C. Utilizing M39029 rear release crimp contacts in various sizes, including coax and twinax options, they ensure secure connections. The high-strength aluminum shells, available in multiple plating options such as electroless nickel and cadmium finishes, provide durability and corrosion resistance. With RoHS compliant cadmium-free finishes available, these connectors are suitable for a wide range of applications requiring rugged and reliable connectivity.