MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. These environmentally sealed connectors operate seamlessly in temperatures ranging from -65 °C to 200 °C. Available in various configurations including front and rear wall mount, jam nut, and box mount receptacles, they offer versatility for different applications. The connectors come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts. Constructed with aluminum shells and offered in multiple plating options such as gold, electroless nickel, and cadmium-free finishes, they ensure reliable performance and durability. Suitable for military and industrial use, these connectors meet the stringent MIL-DTL-38999 II specifications, guaranteeing quality and compliance.