When thin nut is used, it is not used alone, but with another standard nut, which can play a role in preventing loose.When two thick and thin nuts cooperate, there are certain operating specifications.We can also see from the above table that the thin nut should be placed in the front, that is, the thin nut should be screwed in first, and then the standard nut should be screwed in the back. Only when the position is placed correctly, the anti-loosening effect will be better.But in many cases, the installation operation process will not pay attention to this matter, often put the wrong position, so many enterprises in the procurement, direct use of two the same standard nut to install, although this will increase the procurement cost, but also effectively prevent the wrong installation situation.