The Classification And Characteristics Of Hexagon Bolts

Classification and characteristics of hexagon bolts.

Hexagon bolt: A type of fastener consisting of a head and a screw, which needs to be matched with a nut to fasten the two parts through a hole.

Classification

1. There are ordinary holes and reamed holes according to the connection force. Bolts used for reaming should be matched to the size of the hole and 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, the countersunk head is used where the surface after the connection is required to be smooth without protrusions because the countersunk head can be screwed into the part. The head can also be screwed into the part. The tightening force of the square head can be larger, but the size is large. The hex head is the most commonly used.

In addition, in order to meet the needs of locking after installation, there are holes in the head and holes in the rod. These holes prevent the bolts from loosening during vibration. Some bolts without threaded smooth rods are made thinner and are called thin waist bolts. This type of bolt facilitates variable force connections. There are special high-strength bolts on the steel structure, the head will be larger and the size will vary.

In addition, there are special uses: T-slot bolts, which are most used on machine tool fixtures, special shapes, and both sides of the head are cut off. Anchor bolts are used to connect and fix the machine to the ground. There are many shapes, U-bolts, etc. There are also special studs for welding. One end is threaded, and the other is not. It can be welded to the part with the nut screwed directly on the other side.