MIL-DTL-38999 Series II connectors, designed for harsh environments, feature up to 128 contacts in an insert and offer secure environmental sealing. With an operating temperature range of -65 °C to 200 °C, these connectors come in various configurations such as front wall mount, rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for reliable connectivity. Constructed with aluminum shells and offering plating options like cadmium and nickel, these connectors meet stringent military specifications for durability. Suitable for diverse applications, they ensure high performance in demanding conditions.