The friction heat generated during tightening can cause the phenomenon of stainless steel screws to expand and become unmovable. In order to improve this problem, we apply fluorine resin to control the coefficient of friction during fastening, and reduce the frequency of the occurrence of the occurrence of the baked during normal environments. It is extremely efficient to work as compared to the common nuts that are overflowing in the market today. *Due to the characteristics of fluorine resin, there may be a slight stickiness on the surface of the nut.