The MIL-DTL-38999 Series II connectors are designed for harsh environments, with up to 128 contacts in an insert for secure connectivity. These environmentally sealed connectors have a wide operating temperature range from -65 °C to 200 °C, making them suitable for a variety of applications. Available in various mounting options such as front wall mount, rear wall mount, jam nut, and box mount receptacles, they offer flexibility in installation. Featuring 52 insert arrangements with M39029 rear release crimp contacts, these connectors ensure reliable performance. Crafted from aluminum with plating options including electroless nickel and cadmium finishes, they meet stringent military specifications for durability. With a service rating of I and ingress protection for environmental resistance, these connectors are ideal for demanding industrial and military environments.