The Features of Bolt and Nut Coupling(Ⅰ)

The commonly types of bolts daily used include hex head bolts, square head bolts, T-slot bolts, anchor bolts and other bolts of special structures.

While the hex head bolts perhaps are the most common ones, they are divided into different grades of Class A, B and C in accordance with the manufacturing precision and product quality. Hex head bolts of Class A and Class B are widely used, which mainly utilized in cases of very important, high-precision assembly, a larger impact or vibration by load and load changes. To be continued...