MIL-DTL-38999 Series II connectors are designed for rugged 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 reliable performance in harsh conditions. Available in various mounting styles including front and rear wall mount, jam nut, and box mount receptacles, they provide versatility in installation. The connectors come in aluminum shells with options for plating such as cadmium and nickel, meeting different environmental requirements. Utilizing M39029 rear release crimp contacts, they ensure secure connections. Suitable for military and aerospace applications, these connectors are engineered for durability and longevity.