Thread on the outside of a cylindrical piece of stock.

Thread on the inside of a cylindrical hole.

A fastener is a mechanical device for holding two or more bodies in definite positions with respect to each other.

A threaded fastener is a fastener, a portion of which has some form of screw thread.

Is one which can be referenced from nationally recognized standards documents. EXAMPLE 1: Hex bolt M12 x 1.75 x 150, class 4.6 zinc plated. EXAMPLE 2: Hex cap screw 3/4-10 UN UNC x 4-2A SAE G Gr [..]

A term used to describe an externally threaded fastener with a protruding head, designed to be torqued by a spanner or wrench and always preceded by a head style such as Hex cap screw, Socket head cap [..]

A set screw is a headless threaded fastener that is typically used to hold a sleeve, collar or gear on a shaft to prevent relative motion.

It is the term used for a threaded fastener, with a head, designed to be used in conjunction with and properly assembled by means of tightening a nut.

A stud is a headless fastener, which has threads at both ends of the shank. One end is inserted into an internally tapped hole and tightening a nut on the other end induces tension. If a stud is threa [..]

A nut is a geometrically designed block(usually of metal or plastic) with an internal thread and designed to be assembled in conjunction with a bolt or screw.