MIL-DTL-38999 Series II connectors are designed for rugged environments with up to 128 contacts housed in an insert. Operating between -65°C and 200°C, they offer reliable performance in extreme conditions. These connectors, featuring various mounting options like front and rear wall mount, jam nut, and box mount receptacles, are essential for military and aerospace applications. With 52 insert arrangements available, they accommodate diverse connectivity needs. Constructed from aluminum with plating options including cadmium and electroless nickel, they ensure durability and corrosion resistance. The connectors, meeting MIL-DTL-38999 II specifications, are RoHS compliant and designed for 500 mating cycles, making them ideal for demanding environments requiring secure and high-performance electrical connections.