The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With a wide operating temperature range from -65°C to 200°C, these connectors offer reliable performance in extreme conditions. Available in various mounting styles, including front and rear wall mount, jam nut, and box mount receptacles, they provide flexibility for different applications. The connectors come in aluminum shells with options for plating, such as cadmium and nickel finishes. With RoHS certified cadmium-free alternatives, they meet environmental standards. Utilizing M39029 rear release crimp contacts, these connectors ensure secure connections. Suitable for military and industrial use, they offer durability and longevity, with a service class rating of E.