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, they offer reliable performance in extreme conditions. Available in various configurations including front and rear wall mount, jam nut, and box mount receptacles, these connectors provide versatility for different applications. Utilizing M39029 rear release crimp contacts, they ensure secure connections. Constructed with aluminum shells and offered in plating options such as cadmium and nickel, they meet stringent military specifications for durability. Suitable for aerospace, defense, and industrial use, these connectors are essential for maintaining reliable electrical connections in demanding environments.