The MIL-DTL-38999 Series II connectors offer high-performance connectivity with up to 128 contacts, featuring environmentally sealed inserts for reliable operation in harsh conditions. With a wide operating temperature range from -65 °C to 200 °C, these connectors are suitable for demanding applications. Available in various mounting options including jam nut, rear box, and front box mount receptacles, they offer flexibility in installation. The connectors come in aluminum shells with plating options such as electroless nickel and cadmium finishes, ensuring durability and corrosion resistance. Compliant with military specification MIL-DTL-38999 II, these circular receptacles are ideal for aerospace, defense, and industrial use.