MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various configurations including front and rear wall mount, jam nut, and box mount receptacles, these connectors offer versatility for different applications. With 52 insert arrangements and M39029 rear release crimp contacts, they ensure reliable connections. Made of aluminum with options for plating such as cadmium and nickel, they meet stringent military specifications for durability. Suited for demanding environments, these connectors guarantee secure and efficient electrical connections.