The Shape Of The Bolt

Generally, a countersunk head is used in areas that require a smooth surface without protrusions after connection, as the countersunk head can be screwed into the part. Round heads can also be screwed into parts. The tightening force of the square head can be greater, but the size is large. 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, with larger heads and varying sizes. Additionally, there are special uses for T-groove bolts, which are most commonly used on machine tool fixtures. They have a special shape and require cutting off both sides of the head. Anchor bolts, used for connecting and fixing machines to the ground, come in many shapes. U-bolts, as mentioned earlier. Wait a minute. 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.