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 connectors, with various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, are ideal for military and aerospace applications. Utilizing M39029 rear release crimp contacts, they ensure secure connections in sizes 22D, 22M, 22, 20, 16, and 12. With aluminum shells and a choice of plating options including cadmium and nickel, these connectors provide durability and corrosion resistance. Compliant with RoHS regulations, they guarantee environmental safety while delivering efficient connectivity for critical systems.