MIL-DTL-38999 Series II connectors are designed for harsh environments, offering up to 128 contacts in an insert. These connectors are environmentally sealed, with an operating temperature range of -65 °C to 200 °C. Featuring various mounting options including front and rear wall mount, jam nut, and box mount receptacles, they provide versatility in installation. Available in nine shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for reliable connectivity. Constructed with aluminum shells and offered in multiple plating options such as gold and electroless nickel, these connectors ensure durability and performance. With RoHS certified finishes available, they meet environmental compliance standards, making them ideal for military and industrial applications requiring rugged and reliable connectivity solutions.