MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert with environmental sealing. Operating between -65 °C and 200 °C, these connectors come in various configurations such as front and rear wall mount, and jam nut receptacles. Utilizing M39029 rear release crimp contacts, they offer reliable connectivity in sizes 22D, 22M, 22, 20, 16, and 8. Constructed with high-strength aluminum shells, they are available in multiple plating options including cadmium and electroless nickel. Meeting military specifications, these connectors are ideal for applications requiring durability and performance in demanding conditions.