MIL-DTL-38999 Series II connectors offer exceptional performance in harsh environments, with up to 128 contacts housed in a durable insert. These circular receptacles, designed for jam nut mounting, feature various mounting options such as front and rear wall mount, jam nut, and box mount configurations. 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 including electroless nickel and cadmium finishes, these connectors ensure reliable conductivity and durability. With an operating temperature range from -65 °C to 200 °C, they are ideal for military and industrial applications requiring rugged, high-performance connectivity.