MIL-DTL-38999 Series II connectors are designed for rugged environments, featuring up to 128 contacts in a sealed insert. With an operating temperature range from -65 °C to 200 °C, they offer reliability in harsh conditions. Available in various mounting styles such as front and rear wall mount, jam nut, and box mount receptacles, these connectors provide flexibility for different applications. The connectors come in aluminum shells with plating options including cadmium and nickel, ensuring durability. Incorporating removable crimp contacts and bayonet coupling, they are ideal for military and aerospace use, meeting stringent performance standards.