MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. These thin-walled connectors come in various mounting options, including front wall, rear wall, jam nut, rear box, and front box mount receptacles. Available in aluminum shells with multiple plating choices, such as cadmium and nickel, they offer reliable connectivity with M39029 rear release crimp contacts. Meeting military specification MIL-DTL-38999 II, they ensure secure and durable performance in demanding applications.