MIL-DTL-38999 Series II connectors are robustly designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range spanning from -65 °C to 200 °C, these connectors offer reliable performance in extreme conditions. Available in various mounting styles such as front and rear wall mount, jam nut, and box mount receptacles, they cater to diverse application needs. The connectors come in 9 shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12. Constructed with aluminum shells and offering multiple plating options including cadmium and nickel, they ensure durability and corrosion resistance. Suitable for military and industrial use, these connectors are ideal for applications requiring secure and high-performance electrical connections in demanding environments.