MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating range of -65 °C to 200 °C. Available in various mounting styles including front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in installation. With 52 insert arrangements and sizes ranging from 22D to 12, these connectors accommodate diverse requirements. Made of aluminum, they come in plating options such as cadmium and nickel for corrosion resistance. Meeting military specification MIL-DTL-38999 II, these circular receptacles ensure reliable electrical connections in demanding applications.