1. Classification of fasteners
There are many types of fasteners, which can be mainly divided into the following categories according to shape and function:
Bolt: A cylindrical fastener with threads, usually used in conjunction with a nut, to achieve a tightening effect by rotating the nut. Bolt...
1. Material: Ordinary carbon structural steel (Q yield strength), high-quality carbon structural steel (with an average carbon mass fraction of 20/10000), alloy structural steel (with an average manganese mass fraction of about 2% in 20Mn2), cast steel (ZG230-450 yield point not less than 230, te...
