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Standard fasteners are divided into ten categories

Standard fasteners are divided into ten categories. The selection should be based on the use of standard fasteners and their use.

1.Bolt: Bolts are generally matched with nuts (usually with a washer or two washers) for connection and fastening purposes.

2.nut: The nut is matched with the bolt.

3.Screws: Screws are usually used separately (sometimes with a washer) and are generally tightened or tightened.

4.Studs: Studs are generally threaded at both ends (single-headed studs are single-ended with threads). Usually, a rib is firmly screwed into the part body, and the other end is matched with the nut to connect and fasten. But to a large extent also has the role of distance.

5.Washer: The washer is placed between the bearing surface of bolts, screws and nuts and the process support surface to prevent loosening and reduce the stress on the bearing surface.

6.Self-tapping screws: The workpiece screw holes matched with the self-tapping screws do not need to be tapped beforehand. When the self-tapping screws are screwed in, the internal threads are formed.

7.rivets: The rivet has a head at one end and the stem is unthreaded. In use, the rod is inserted into the hole of the connected piece, and then the end of the rod is riveted for connection or fastening.

8.pin: The pin is inserted into the workpiece during use, usually for connection or positioning.

9.retaining ring: The retaining ring is usually on the shaft or in the hole to limit the axial direction of the workpiece.

10.wood screws: Wood screws are used to screw into the wood for connection or fastening.

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