What are the hardness grades of hexagon socket bolts

From the name, it can be known that the cylindrical head of the hexagon socket bolt has a hexagon socket shape. There are many kinds of hardness grades, and users can choose according to their different needs to ensure the tightening effect of the bolt.

The hardness level of the hexagon socket bolts will vary according to different materials and processing techniques.

Its strength can be divided into ordinary type and high-strength type. The general grade is 4.8, and the hardness of high-strength hexagon socket bolt is 8.8.

Generally, the material of high-strength hexagon socket bolts is generally low-carbon alloy steel or medium-carbon steel, and the processing process is more. It needs heat treatment such as quenching and tempering to strengthen the strength of the bolt.

The hardness of the hexagon socket bolts is different, so its price must be different, generally the price of high hardness is also high.

Of course, when you choose the grade of the hexagon socket bolts, you can choose according to the purpose. If the ordinary grade bolts can meet the needs, there is no need to spend high prices to choose high-strength bolts.

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