High-strength bolts are widely used in modern life, so understanding the specifications of high-strength bolts is of great help to our purchase and use. Next, let us take a look at the detailed analysis of high-strength bolt specifications for your reference.
High-strength bolt specifications refer to the size of high-strength bolts. It is stipulated in the national standard GB/T1228-91. The specifications and sizes of high-strength bolts with thread specifications of M12~M30 can refer to this standard. Therefore, it is very important to choose the specifications and models of high-strength bolts that suit you.
In the standard GB/T1228~1231-91, the torque coefficient of the high-strength large hexagon head bolt connection pair with thread specifications M12~M30 is specified. Among them, the average value of the torque coefficient is 0.11~0.150, and the standard deviation is less than or equal to 0.010. The 8.8S high-strength large hexagonal head bolt connection pair can also be supplied according to customer requirements to ensure the torque coefficient.
In addition, the national standard GB/T3632~3633-1995 stipulates the tightening axial force of torsion-shear type high-strength bolt connection pairs. Among them, the thread specifications are M16~M24. The average value of the fastening axial force in each batch has a certain fluctuation range based on the nominal value, and the maximum and minimum values are also limited. At the same time, the standard deviation of the tightening axial force must also comply with regulations.
Therefore, when purchasing and using high-strength bolts, we need to carefully check the specifications and relevant standards, and follow national regulations to use qualified products to ensure effectiveness and safety.
In short, the specifications and standards of high-strength bolts are important references for purchase and use. We need to understand and master relevant knowledge and choose carefully. At the same time, manufacturers should also produce high-quality products in strict accordance with national standards to provide users with better services and quality assurance.
