MIL-DTL-38999 Series II connectors are designed for demanding environments, with up to 128 contacts housed in a sealed insert. Operating between -65 °C and 200 °C, these connectors offer reliability in extreme conditions. Featuring various mounting options including front and rear wall mount, jam nut, and box mount receptacles, they provide versatility in installation. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. With options for RoHS compliant finishes, such as electroless nickel plating, they meet environmental standards. Ideal for military and industrial applications, these connectors ensure durable and efficient performance.