The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts within an insert. These circular connectors are environmentally sealed and can operate in temperatures ranging from -65°C to 200°C. Available in various mounting styles such as front wall mount, rear wall mount, jam nut, and box mount, they offer versatility for different applications. With options for straight, RFI grounding, and standard plugs, as well as multiple shell sizes and insert arrangements, these connectors provide flexibility in design. Made of aluminum with plating choices including electroless nickel, they ensure durability and reliability. Meeting MIL-DTL-38999 II specifications, these connectors are ideal for military and aerospace applications requiring rugged performance in demanding conditions.