Bolts are connecting devices with round and threaded rods, one end of which is a bolt head (generally a hexagon head) and the other end is fitted with a nut / lock. In use in the field, bolts can be used to make construction of fixed connections, movable connections, and temporary connections that can be disassembled / re-released. The form of threaded rod bolts for building steel is generally a triangular screw (sharp thread) according to its function as a bolt binder. While the form of a rectangular screw (blunt threaded) is generally for drive bolts or power shifters such as jacks or other machining tools.
