Brief introduction to the application and classification of high-strength bolts

High-strength bolts are mainly used in steel structure engineering to connect the connection points of steel structure steel plates. 　　

A very important feature of high-strength bolts is that they are limited to single use. They are generally used for permanent connections. Repeated use is strictly prohibited!　　

Classification of high-strength bolts: 　　

According to the force state, it is divided into: friction type and pressure type; 　　

According to the construction process, it is divided into: torsion shear type high-strength bolts and large hexagonal high-strength bolts. (Guide: Overview of high-strength bolt processing technology introduction) 　　

Large hexagonal high-strength bolts belong to the high-strength grade of ordinary screws, while torsion shear type high-strength bolts are improved types of large hexagonal high-strength bolts for better construction. 　　

The construction of high-strength bolts must be first tightened first and then final tightened. The first tightening of high-strength bolts requires an impact type electric wrench or torque adjustable electric wrench; and the final tightening of high-strength bolts has strict requirements, the final tightening of torsion shear High-strength bolts must use torsion shear type electric wrenches, and final tightening torque-type high-strength bolts must use torque type electric wrenches. 　　

Large hexagonal strong bolts consist of one bolt, one nut and two washers.

Large hexagon bolts, torsion shear type high-strength bolts, consist of one bolt, one nut and one washer.

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