Fasteners are a kind of mechanical parts which are used for fastening and connecting and are widely used. All kinds of fasteners can be seen on all kinds of machinery, equipment, vehicles, ships, railways, bridges, buildings, structures, things, instruments, appearance and supplies. It is characterized by a complex variety of standards, different functional uses, and a high degree of standardization, serialization and generalization. So it is also called standard fasteners, or standard parts for short.
Fasteners include bolt, stud, screw, nut, gasket, pin, ring, welding nail, rivet, connecting pair, wooden screw and self tapping screw.
