The steel acorn nut has a zinc-plated finish. The acorn nut, also called a cap nut, has a domed top that covers exposed threads on rods, studs, and bolts. Steel is often used in applications where strength is the primary consideration. The zinc plating offers corrosion resistance and a reflective appearance.Nuts are internally threaded fasteners that are used with bolts and threaded rods and studs to connect components. Several different nut styles fit a variety of application and installation requirements. Some styles, such as hex nuts, acorn nuts, flange nuts, and coupling nuts, must be tightened with a tool. Others, such as eye nuts, thumb nuts, and wing nuts, can be tightened by hand. Nut styles such as locknuts and self-locking hex nuts have a locking mechanism that makes them suitable for applications with a high amount of vibration.
