Bolts and Nuts
Thread Content
Why are bolts harder than nuts?
This is mainly to protect the threads of the bolts. After all, bolts are much more expensive than nuts.
The cost of bolts is high. Is it more troublesome to replace bolts than to replace nuts?
Take a look here, it’s explained in more detail: http://bbs.hcbbs.com/viewthread.php?tid=410301&highlight=%C2%DD%C4%B8
This will wear the nut first, so there is no need to replace the bolt when replacing it, just replace the nut.
The reason is two days: 1. In order to better protect the threads 2. If the rust is difficult to remove, the nuts can be chipped off with a chisel, while the bolts can still be used after being cleaned with oil.
After all, the bolts play the main role