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, with an operating temperature range from -65°C to 200°C. Available in various configurations such as front wall mount, rear wall mount, jam nut, and box mount receptacles, they offer versatility in installation. The connectors come in aluminum shells with options for plating, including cadmium and nickel finishes. Utilizing M39029 rear release crimp contacts, they ensure reliable connectivity. RoHS compliant versions are also available, meeting modern environmental standards. Perfect for military and industrial applications, these connectors provide durable and secure electrical connections.