The main purpose of Square Bolt is to fasten utensils and parts. The square bolt can be used to prevent the relative movement between the shaft and the sleeve.
Before assembling the threads, the stainless steel Square Bolt should be lubricated to avoid the chance of wear due to the sliding surfaces sticking together.
If the bolt is used for a long time, it will rust. If it is only a small area of rust, it will be fine, but if there is a large area of rust, how to get the bolt.