The 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 of -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 provide flexibility for different applications. The connectors come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts. Constructed with aluminum shells and offered in different plating options, such as cadmium and nickel, they ensure durability and corrosion resistance. Suitable for military and industrial use, these connectors meet stringent MIL-DTL-38999 II specifications for quality and performance.