MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various configurations including front and rear wall mount, jam nut, and box mount receptacles, they offer versatility for different applications. With 52 insert arrangements and M39029 crimp contacts, these connectors ensure reliable connectivity. Constructed with aluminum shells and offering plating options like electroless nickel and cadmium finishes, they meet stringent military specifications for durability. Suitable for military and aerospace use, these connectors ensure secure and efficient electrical connections under demanding conditions.