MIL-DTL-38999 Series II connectors are designed for rugged environments, with up to 128 contacts in an insert and a wide operating temperature range (-65 °C to 200 °C). Featuring various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in installation. Available in 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts for reliable connections. Made of aluminum with plating options including electroless nickel, they ensure durability and performance. With RoHS certified finishes, they meet environmental standards, making them ideal for military and aerospace applications.