MIL-DTL-38999 Series II connectors offer reliable performance in harsh environments, with up to 128 contacts contained in an insert. These environmentally sealed connectors have an operating temperature range of -65 °C to 200 °C and come in various mounting options including front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they feature 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, these connectors are suitable for military and industrial applications requiring durability and high performance.