MIL-DTL-38999 Series II connectors are designed for rugged environments, offering secure connectivity with up to 128 contacts in an insert. These environmentally sealed connectors feature a wide operating temperature range from -65 °C to 200 °C. The harsh environment thin-walled options include various mounting styles such as front and rear wall mount, jam nut, and box mount receptacles. Available in aluminum shells with multiple plating options, including cadmium-free finishes, they ensure durability and reliability. Utilizing M39029 rear release crimp contacts, these connectors come in 9 shell sizes and 52 insert arrangements, suitable for various applications. Meeting military specification MIL-DTL-38999 II, they provide a high level of performance in demanding scenarios. Perfect for industrial and military use, these connectors are essential for maintaining seamless electrical connections in critical operations.