MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various mounting styles including front wall, rear wall, jam nut, and box mount receptacles, they offer versatility for different applications. These connectors come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts. Constructed with aluminum shells, they are offered with plating options such as cadmium and nickel, ensuring durability. With RoHS compliant finishes available, these connectors meet stringent environmental standards, making them ideal for military and industrial use.