The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert with environmental sealing. Operating between -65°C and 200°C, these connectors come in various configurations including front and rear wall mount, jam nut, and box mount receptacles. Available in aluminum shells with plating options such as gold, electroless nickel, and cadmium-free finishes, they offer reliable connectivity for military and industrial applications. With M39029 rear release crimp contacts in sizes 22D to 12, these connectors ensure secure and durable connections, making them ideal for demanding environments requiring high-performance electrical connectivity.