The Main Classification Of Hexagonal Bolts

1. According to the force distribution of the connection, there are ordinary and hinged holes. The bolts used for hinged holes should match the size of the holes and be used when subjected to lateral forces

2. According to the shape of the head, there are hexagonal heads, round heads, square heads, countersunk heads, etc. Generally, countersunk heads are used in areas where the surface is required to be smooth and without protrusions after connection, because countersunk heads can be screwed into the part. Round heads can also be screwed into the part. The tightening force of square heads can be larger, but the size is large. Hexagonal heads are the most commonly used.

In addition, to meet the need for locking after installation, there are holes on the head and the rod, which can prevent the bolt from loosening when subjected to vibration.

Some bolts without threads need to be made thin, called slim waist bolts. This type of bolt is beneficial for connecting under variable forces.

There are specialized high-strength bolts on the steel structure. The head will be made larger, and the size will also change.

Additionally, there are special uses for T-groove bolts, which are most commonly used on machine tools and fixtures. They have a special shape and need to be cut off on both sides of the head. Anchor bolts are used for connecting and fixing machines to the ground in many shapes, such as U-bolts, and so on.

There are also specialized bolts for welding, with threads on one end and no threads on the other end, which can be welded onto the parts while directly tightening the nuts on the other side.