MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in a sealed insert. With an operating temperature range of -65 °C to 200 °C, these connectors offer reliability in extreme conditions. Available in various mounting styles, including jam nut and box mount, they provide flexibility for different applications. Made of aluminum with plating options such as cadmium and nickel, they meet RoHS compliance standards. These connectors, with M39029 rear release crimp contacts, ensure secure and efficient electrical connections for military and industrial use.