What is the meaning of standard fasteners?

Standardized mechanical parts for fastening joints. Standard fasteners mainly include bolts, studs, screws, setting screws, nuts, washers and rivets.
There are many structural types of bolts with hexagonal heads. For bolts subjected to impact, vibration or variable load, the rod part is made into thin segments or hollow in order to increase flexibility. The seat end of the stud is screwed into the threaded hole of the connecting part, and the nut used in the nut end is similar to the bolt nut. The structure of the screw is roughly the same as that of the bolt, but the head shape is varied to adapt to different assembly space, tightening degree and joint appearance. Setting screws have different head and end shapes to accommodate different degrees of tightening. Nuts are also of various types, with hexagonal shapes being the most widely used.
The washer is mainly used to protect the supporting surface of the connected part. Bolts, nuts and other multi-purpose carbon steel manufacturing, but also useful alloy steel, when there are corrosion prevention or conductive requirements can also be made of copper, copper alloy and other non-ferrous metal.
The standards of China and many other countries stipulate that threaded connectors should be graded according to mechanical properties, and the grade code should be marked on the fastener. Rivets are made of steel, aluminum alloy or copper alloy, and the head has a variety of shapes to adapt to the needs of different riveting joints.


Post time: Apr-20-2023