MIL-DTL-38999 Series II connectors are designed for challenging environments, featuring up to 128 contacts in an insert and offering reliable performance in temperatures ranging from -65 °C to 200 °C. These harsh environment thin-walled connectors come in various configurations including front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes with 52 insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. Crafted from durable aluminum, with plating options such as gold, electroless nickel, and cadmium-free finishes, these connectors ensure longevity and performance. Ideal for military, aerospace, and industrial applications, they meet MIL-DTL-38999 II specifications for quality and reliability.