MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert and offering secure environmental sealing. With an operating temperature range from -65°C to 200°C, they ensure reliable performance in extreme conditions. Available in various mounting styles, including front and rear wall mount, jam nut, and box mount receptacles, these connectors provide versatility for different applications. They come in aluminum shells with multiple plating options, such as cadmium-free finishes, ensuring compliance with RoHS regulations. Utilizing M39029 rear release crimp contacts, they guarantee efficient connectivity, while their gold plating enhances conductivity. Suitable for military and industrial use, the MIL-DTL-38999 Series II connectors are durable, with a service rating of I and a mating life of 500 cycles, making them ideal for demanding environments that require high-performance electrical connections.