Why does the hexagonal stainless steel screw fall off automatically?

The hexagonal stainless steel screw has been tightened. Why does it automatically fall off after a while? There are several reasons:
One is that the order in which the components are fastened is not scientific. Other screws and hexagonal stainless steel screws have uneven stress, resulting in a reduction in the force-transmitting friction surface, a slight displacement of the screw in the hole, and a long-term external force caused by the reciprocating load.

The two are hexagonal stainless steel screw thread cotton contaminated or damaged, resulting in a reduction in the thread’s own anti-slip coefficient.
Third, the inclination angle of the hexagonal stainless steel screw thread is greater than the self-locking angle. When the static friction coefficient μ of the rough surface is greater than or equal to tgα (α is the inclination of the slope), the object does not slip, resulting in self-locking, so it is related to the inclination of the slope. That is, the downward sliding force along the oblique surface is less than or equal to the frictional force. Mgsinα≤μmgcosα, after simplification, tgα≤μ.

The above is the case where the hexagonal stainless steel screw is detached. Shenzhen Shi shi tong Hexagonal Stainless Steel Screws 20 years manufacturer service batch type customers, can be customized according to customer requirements, our service hotline: 0755-27322278.