First of all, I think that when choosing steel structure anchor bolts, you need to carefully look at what strength grade it is. Generally, steel structure anchor bolts have several hardnesses, that is, strength grades. There are 8.8 others, 10.9 others, and more. High 12.9 level others. So when we choose to use steel structure anchor bolts, we need to see which strength level it is. For example, the tensile strength of screws and the safety load of nuts. This is a convenience.
The length of other steel structure screws must be selected appropriately. It is better to reveal one or two pitches of the nut after tightening.
There is another situation that causes the anchor bolts of the steel structure to lock up. I think it is because the tooth pattern is rough or there is a foreign body sticking to it. For example, some solder joints and other metal shavings are caught between the tooth patterns. The anchor bolts and nuts of the steel structure are locked.
Another point is that excessive force may be caused by too fast locking speed, so when installing the steel structure anchor bolts, a torque wrench must be used to tighten the nut, or a socket wrench may also be used. These are also to prevent the occurrence of bolt lock problems.