A fine thread nut is a common object used to connect two parts. In contrast to the fine thread nut, there is also a nut called a coarse nut. This coarse nut is used in the general case, or in the case where the fineness is not required, the coarse nut is used. It is required to have better fixing and sealing, and there is a time when the joint is rotated, that is, when the fine thread nut is used. So what is the difference between a fine thread nut and a coarse nut? Where are the fine thread nut nuts used? Let's take a look at it together.