The 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, available in various mounting styles including jam nut, front and rear wall mount, and box mount receptacles, are ideal for military and aerospace applications. With aluminum shells and a choice of plating options such as cadmium and nickel, they ensure durability and conductivity. The removable crimp contacts, gold-plated for enhanced performance, are rated for 500 mating cycles. Meeting military specification MIL-DTL-38999 II, these circular connectors are essential for secure and efficient electrical connections in demanding settings.