The MIL-DTL-38999 Series II connectors are designed for harsh environments, offering superior performance with up to 128 contacts in an insert. These environmentally sealed connectors have a wide operating temperature range from -65 °C to 200 °C. Featuring various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they cater to diverse installation needs. Available in 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts for reliable connections. Crafted from aluminum, they come with multiple plating options, including cadmium and nickel finishes. Meeting MIL-DTL-38999 II military specifications, these connectors ensure durability and performance in demanding applications.