The MIL-DTL-38999 Series II connectors are designed for harsh environments, offering up to 128 contacts in an insert with front wall mount, rear wall mount, jam nut, rear box mount, and front box mount receptacles. These connectors feature a durable construction, operating efficiently in temperatures ranging from -65 °C to 200 °C. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for reliable connections. With options for gold contact plating and various finishes including electroless nickel and cadmium olive drab, these connectors ensure superior performance and corrosion resistance. Perfect for military and aerospace applications, they meet MIL-DTL-38999 II specifications for quality and reliability.