Fastener is the general name of a kind of mechanical parts used to fasten and connect two or more parts (or components) into a whole. Also known as standard parts on the market.
It usually includes the following 12 types of parts:
Bolts, studs, screws, nuts, self tapping screws, wood screws, washers, retaining rings, pins, rivets, assemblies and connecting pairs, welding nails.
(1) Bolt: a kind of fastener composed of head and screw (cylinder with external thread), which needs to be matched w...