The MIL-DTL-38999 Series II connectors are designed for rugged environments, with up to 128 contacts in an insert for versatile connectivity. These connectors are sealed for protection and can operate in temperatures ranging from -65 °C to 200 °C. Featuring various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they offer flexibility in installation. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for secure connections. Made of aluminum with multiple plating options, including cadmium-free finishes, these connectors ensure durability and reliability. Suitable for military and industrial applications, they meet MIL-DTL-38999 II specifications for performance and quality.