The MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, designed for harsh environments with operating temperatures ranging from -65 °C to 200 °C. Available in various mounting styles such as front and rear wall mount, jam nut, and box mount receptacles, they offer versatility for different applications. With 52 insert arrangements and M39029 rear release crimp contacts, these connectors ensure reliable connectivity. Constructed with aluminum shells and plated with options like electroless nickel and cadmium finishes, they meet stringent military specifications for durability. The bayonet coupling and gold-plated contacts guarantee secure mating and optimal signal transmission. Suitable for environment-resistant applications, these connectors are essential for demanding industrial and military environments.