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 from -65 °C to 200 °C, these connectors offer reliability in extreme conditions. Available in various mounting styles, including front and rear wall mount, jam nut, and box mount receptacles, they provide versatility for different applications. The connectors come in aluminum shells with options for plating, such as cadmium and nickel, meeting diverse industry requirements. Utilizing M39029 rear release crimp contacts, they ensure secure and efficient connections. These connectors are ideal for military and aerospace applications, offering durability and performance in demanding settings.