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 such as front and rear wall mount, jam nut, and box mount receptacles, they cater to diverse installation needs. The connectors come in 9 shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts in multiple sizes. Constructed with aluminum shells and offering plating options like cadmium and nickel, they ensure durability and corrosion resistance. Meeting military specification MIL-DTL-38999 II, these connectors are ideal for demanding applications that require rugged and high-performance connectivity.