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