Today, whether it is fasteners for the mechanical industry, electronic fasteners or electric fasteners. Stainless steel bolts and nuts are connected with many fasteners. It should be ensured that they have sufficient pre-tightening force, but not too tight. If it is tightened too tightly, on the one hand, the coupling will be permanently deformed under the action of external force; on the other hand, the bolt will be stretched and permanently deformed, and the pre-tightening force will be reduced, even causing bending or fracture.
According to online reprint, when training auto repair workers, BMW's ordinary bolt requirements are very strict. The trainer showed the simplest tightening workflow: the tightening torque of the screw should reach 30N·m, the force should not be too large or too small, the first angle should reach 90 degrees, and the second angle should be reached. 180 degrees...All values have strict requirements and are measured with special tools.
Stainless steel bolts are small and the effect may be important, so choosing the right stainless steel bolt is very important.
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