The 3060680 is a 3.5x16 hardened steel, zinc-plated screw with a cheese head and octagonal shape, manufactured by Bossard. It has a zinc-plating for improved durability, corrosion resistance, and aesthetic appeal. The screw is designed for use in various applications, such as furniture, cabinets, and other woodworking projects. It is also suitable for outdoor applications, as its zinc-plating offers protection against rust.