The MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. Available in various mounting styles such as front wall, rear wall, and jam nut receptacles, they offer versatility in installation. With 52 insert arrangements and M39029 rear release crimp contacts, these connectors ensure reliable connectivity. Constructed with aluminum shells and plating options including gold, electroless nickel, and cadmium finishes, they meet stringent military specifications for durability and performance. Suitable for applications requiring rugged, high-temperature resistant connectors, the MIL-DTL-38999 Series II connectors provide a secure and efficient solution for demanding environments.