MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert for secure connections. With a wide operating temperature range of -65 °C to 200 °C, these environmentally sealed connectors offer reliability in extreme conditions. Available in various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they provide flexibility for different installations. The connectors come in aluminum shells with plating options including gold, electroless nickel, and cadmium finishes, ensuring durability and conductivity. With RoHS compliant alternatives, these connectors are suitable for military and industrial applications requiring high-performance and rugged connectivity solutions.