Bolts are common mechanical parts of life. They are often used together with cylindrical threaded fasteners of nuts. The spiral is composed of a head and a cylindrical thread with external threads. It is often called a spiral connection. If you need to remove the nut from the bolt, you can separate the two parts again, so the bolt connection is a detachable connection, which can be recycled, and the economic benefits are very good. Next, Bolts Factory will introduce the classification of bolts.

1. According to the force method:
It can be branched into common type and hole-making type.

2. According to the shape of the head:
It can be divided into countersunk head, square head, round head, and hexagon head.

3. According to the length of the thread:
It can be divided into full thread and non-thread.

4. According to the tooth shape of the thread:
It can be divided into coarse teeth and fine teeth. The style of coarse-tooth shape will not be shown in the bolt logo.

5.According to its grade:
It can be divided into 8 different levels: 12.9, 10.9, 9.8, 8.8, 5.8, 5.6, 4.8, 3.6. Among them, the bolt material of 8.8 and above includes low-carbon alloy steel or other medium-carbon steel plates.