MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range of -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 requirements. The connectors come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and offering plating options like cadmium and nickel, they ensure durability and conductivity. Ideal for military and industrial use, these connectors meet MIL-DTL-38999 II specifications, providing a high level of performance and reliability.