The 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 in installation. With options for straight, RFI grounding, and standard plugs, as well as multiple shell sizes and insert arrangements, these connectors ensure compatibility with diverse systems. Constructed with aluminum shells and offering plating choices such as gold, electroless nickel, and cadmium-free finishes, they prioritize durability and performance. Meeting military specifications, these connectors are ideal for applications requiring rugged and reliable electrical connections in demanding conditions.