The MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, designed for harsh environments with operating temperatures ranging from -65 °C to 200 °C. Available in various mounting styles including front and rear wall mount, jam nut, and box mount receptacles, these connectors offer versatility in connectivity solutions. With 52 insert arrangements and M39029 rear release crimp contacts, they ensure secure and reliable connections. Constructed with aluminum shells and offered in different plating options such as cadmium and nickel, they meet stringent military specifications for durability. Suitable for applications requiring environmental resistance, these connectors are essential for aerospace, defense, and industrial sectors.