MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert and environmental sealing. With an operating temperature range of -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, made of aluminum, come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts. Offering plating options like cadmium and nickel, they ensure corrosion resistance. Meeting military specification MIL-DTL-38999 II, these connectors are ideal for applications requiring rugged and durable connectivity.