The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With environmental sealing and a wide operating temperature range from -65 °C to 200 °C, these connectors offer reliable performance in demanding conditions. Available in various configurations such as front and rear wall mount, jam nut, and box mount receptacles, they provide flexibility for different applications. The connectors utilize M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12, ensuring secure connections. Constructed with aluminum shells and offering multiple plating options including cadmium and nickel finishes, they meet stringent military specifications. Suitable for use in aerospace, defense, and other industries, these connectors are built to withstand tough operating environments.