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. Operating between -65 °C and 200 °C, they ensure reliable performance in extreme conditions. These connectors, compliant with military specification MIL-DTL-38999 I, utilize M39029 rear release crimp contacts in various sizes, including coax and twinax options. With high strength aluminum shells and a range of plating choices such as electroless nickel and cadmium finishes, they offer durability and corrosion resistance. Suitable for applications requiring environmental sealing, these connectors are essential for demanding military and industrial settings.