In the process of making the hexagonal bolt, it is mainly a kind of fastener consisting of two parts, the head and the screw. It needs to be matched with the nut to fasten and connect two parts with through holes. Hex bolts are called bolted connections. If the nut is unscrewed from the bolt, it is possible to separate the two parts, so the bolt connection is a detachable connection.
The connection method of the rod end stud is common and has a reaming hole. The bolt for the reaming hole should be matched with the size of the hole. When it is subjected to lateral force, the head shape has a hexagonal head, and the circle Head, square head, countersunk head, etc. The general countersunk head is used in places where the surface is required to be smooth and not raised, because the countersunk head can be screwed into the part. The round head can also be screwed into the part. The square head is tightened. The force can be larger, but the size is large. The hex head is the most commonly used.
In order to meet the requirements of locking after installation, the rod end studs have holes in the head and holes in the rods. These holes can prevent the bolts from being loosened when they are vibrated. Some bolts with unthreaded rods are to be thin, called thin waist bolts. These bolts are beneficial for the coupling of variable forces. There are special high-strength bolts on the steel structure. The head will be larger and the size will change.