The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With a wide operating temperature range from -65 °C to 200 °C, these connectors are reliable in extreme conditions. Available in various mounting styles such as front wall mount, rear wall mount, and jam nut receptacles, they offer flexibility for different applications. The connectors, made with aluminum shells and plated with options like electroless nickel, ensure durability and performance. Meeting military specification MIL-DTL-38999 II, these circular plugs are ideal for demanding industrial and aerospace environments.