A welding stud/Welding Stud Nut is a metal rod or pin with a threaded end that is designed to be welded onto a metal surface. The non-threaded end of the stud is positioned against the workpiece, and the threaded end protrudes for securing other components. Welding studs are commonly used in applications where a threaded connection is needed but welding a nut onto the surface is not practical or desirable.