MIL-DTL-38999 Series II connectors with up to 128 contacts offer reliable performance in harsh environments, featuring environmentally sealed inserts and a wide operating temperature range from -65 °C to 200 °C. Available in various configurations including front and rear wall mount, jam nut, and box mount receptacles, these connectors ensure secure electrical connections. Constructed with aluminum shells and offering multiple plating options, such as electroless nickel and cadmium finishes, they meet stringent military specifications for durability. Utilizing M39029 rear release crimp contacts, these connectors guarantee efficient signal transmission, making them ideal for aerospace, defense, and industrial applications.