MIL-DTL-38999 Series II connectors are designed for harsh environments, with up to 128 contacts housed in a sealed insert. Operating temperatures ranging from -65 °C to 200 °C ensure reliability in extreme conditions. Featuring various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in installation. Available in 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts for secure connections. Crafted from aluminum, they come with plating options including cadmium and electroless nickel for corrosion resistance. Ideal for military and aerospace applications, these connectors meet stringent performance standards.