Bolts are used to fasten and assemble parts from within aligned unthreaded holes, typically with the use of a matching nut. Bolts primarily consist of a shaft and a bolt head. The unthreaded portion of the bolt shaft is called the shank, while the threaded portion is the bolt thread.

A wide range of industries uses bolts with a nut to join either two or more parts together. And, they use tightening torque to serve the purpose. Most bolts find application across structures and assemblies through insertions in the pre-drilled holes. These holes are in the materials that need to be joined.