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The Level Of The Bolt.
Mar 25, 2018

In accordance with the relevant standards, bolt performance are rated 3.6, 4.6, 3.6, 4.6, 6.8, 8.8, 9.8, 10.9, 12.9, and so on more than 10 levels, including a magnitude of 8.8 and above the bolt is made of low carbon alloy steel and medium carbon steel and the heat treatment (quenching and tempering), known as high strength bolts, the rest of the known as ordinary bolts. There are two parts of the bolt performance grade label, which respectively represents the nominal tensile strength and the ratio of the strength of the bolt material.