The MIL-DTL-38999 Series II connectors offer reliable connectivity in harsh environments, featuring up to 128 contacts within an environmentally sealed insert. Designed for durability, they operate seamlessly in temperatures ranging from -65 °C to 200 °C. Available in various mounting options, including front and rear wall mount, jam nut, and box mount receptacles, these connectors ensure versatile installation. With nine shell sizes and 52 insert arrangements, they accommodate a wide range of applications. Utilizing M39029 rear release crimp contacts, these connectors guarantee secure connections. Crafted from aluminum, they come with different plating options, such as cadmium and nickel, meeting diverse needs. Ideal for military and industrial use, the MIL-DTL-38999 Series II connectors provide high-performance solutions in demanding environments.