What Is a Flange Hex Bolt?

Hex flange bolts are hexagonal heads and flanges and screws together to form fasteners.

Hex flange bolt

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Hex flange bolts are hexagonal heads and flanges and screws together to form fasteners.

Hex flange bolts ^[1]

Performance grades of flange bolts for steel structure connection

3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9 and more than 10 levels, of which 8.8

And above bolts are made of low carbon alloy steel or medium carbon steel and heat treated (quenched, tempered)

, Commonly known as high-strength bolts, the rest are commonly referred to as ordinary

bolt. The bolt performance grade label consists of two parts of numbers, which represent the nominal tensile strength value and yield ratio of the bolt material, respectively.

Ordinary bolt heads are thick and difficult to deform. If vibration occurs after tightening, they need to be re-tightened; a thin part of the flange can be slightly deformed and can be locked more firmly. Also, if you go up to the hole, you ca nt use tools with ordinary bolts. The flange bolt head is small, and the flange below also plays a role of fastening, but you can use special tools to go into the hole. , About the same principle as the hexagon socket bolt. Then there is the flat top of the flange, which is safer on softer, non-wear-resistant materials and will not cause perforation.