MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range from -65 °C to 200 °C, these connectors offer reliable performance in extreme conditions. Available in various mounting options including front and rear wall mount, jam nut, and box mount receptacles, they are versatile for different applications. The connectors come in aluminum shells with plating options such as gold, electroless nickel, and cadmium-free finishes. Utilizing M39029 rear release crimp contacts, they ensure secure and efficient connections. Meeting military specification MIL-DTL-38999 II, these circular receptacles are ideal for demanding industrial and aerospace environments.