MIL-DTL-38999 Series II connectors boast a high contact density of up to 128 inserts, ensuring robust connectivity in demanding environments. These circular connectors, featuring a range of mounting options such as front and rear wall mount, jam nut, and box mount receptacles, are designed for harsh conditions. With an operating temperature spanning from -65 °C to 200 °C, they offer reliable performance in extreme heat or cold. Available in various shell sizes and insert arrangements, these connectors utilize rear release crimp contacts for secure connections. Crafted from aluminum, they come with plating options including cadmium and nickel finishes, meeting stringent military specifications. Suitable for diverse applications, these connectors ensure durability and conductivity in critical settings.