MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert and environmental sealing. With an operating temperature range from -65 °C to 200 °C, these connectors offer reliable performance in extreme conditions. Available in various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they provide versatility in installation. The connectors come in aluminum shells with plating options including cadmium and nickel, ensuring durability and corrosion resistance. Utilizing M39029 rear release crimp contacts, they offer secure connections in size 22D to 12. These connectors are ideal for military and aerospace applications, meeting stringent MIL-DTL-38999 II specifications for performance and reliability.