The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert with environmental sealing. Operating between -65 °C and 200 °C, they offer reliable performance in extreme conditions. Available in various configurations including front and rear wall mount, jam nut, and box mount receptacles, these connectors are versatile. With options for straight, RFI grounding, and standard plugs, they cater to different installation needs. Utilizing M39029 rear release crimp contacts, these connectors ensure secure connections. Crafted from aluminum with plating options such as cadmium and nickel, they meet military specifications. The Series II connectors are ideal for applications requiring durability and high performance in challenging environments.