The 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 are versatile and durable. Available in various mounting styles including front and rear wall mount, jam nut, and box mount, they offer flexibility for different applications. The connectors come in aluminum shells with options for plating, such as cadmium and nickel, ensuring reliable performance. Utilizing M39029 rear release crimp contacts, they guarantee secure connections. The Series II connectors meet military specifications for ruggedness and are ideal for demanding situations where connectivity is crucial.