MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts sealed within an insert. With an extensive operating temperature range of -65 °C to 200 °C, these connectors offer reliable performance in demanding conditions. Available in various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they ensure versatility in installation. The connectors boast 52 insert arrangements and utilize M39029 rear release crimp contacts, providing flexibility in contact configuration. Constructed with aluminum shells and offering multiple plating options including cadmium and nickel, they prioritize durability and corrosion resistance. These connectors, compliant with military specification MIL-DTL-38999 II, guarantee high-quality electrical connections for critical applications.