Fastener

Fastener is a kind of mechanical parts used for fastening connection and widely used.A wide variety fasteners of Screw Bolt Nut can be found on all kinds of achinery,equipment,vehicles,ships,railways,bridges,building,structures,tools,instruments,meters and supplies.It is characterized by a variety of specifications,performance and use of different and standardization,serialization,generalization of the species is also very high.Therefore,some people have national standard fasteners called standard fasteners or referred to as standard parts.