MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various mounting styles including front and rear wall mount, 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 in sizes 22D, 22M, 22, 20, 16, and 12. Constructed with aluminum shells and offering plating options such as cadmium and nickel, they ensure durability and reliability. With RoHS certified finishes available, they meet environmental standards. Perfect for military and industrial use, these connectors provide secure and efficient electrical connections in demanding conditions.