The MIL-DTL-38999 Series II connectors are designed for harsh environments, offering up to 128 contacts in a single insert. With a wide operating temperature range of -65 °C to 200 °C, they are suitable for demanding applications. Featuring various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they provide versatility in installation. These connectors come in 9 shell sizes and 52 insert arrangements, accommodating different contact sizes for optimal performance. Constructed with aluminum shells and available in plating options like electroless nickel and cadmium-free finishes, they ensure durability and reliability. Suitable for military and industrial use, the MIL-DTL-38999 Series II connectors meet stringent standards for performance and environmental protection.