Definition of a Self-Locking Nut

A self-locking nut is a type of nut equipped with a locking mechanism, serving to prevent loosening within a fastener assembly. Based on their structural design and locking principles, self-locking nuts can be categorized into the following types:

 

Reinforced Self-locking Nuts: These nuts are characterized by the inclusion of a cushioning washer-or similar insert-within the nut body, creating a spring-like structure. Their primary function is to enhance the nut's locking force while simultaneously mitigating the adverse effects of vibration and external loads on the fastener.

 

Ridge-type Self-locking Nuts: These nuts are distinguished by the varying width and height of their thread ridges. Through the elastic deformation of these ridges, significant frictional force is generated between the nut and the mating thread, thereby achieving a locking effect.

 

Load-bearing Self-locking Nuts: These nuts are characterized by the incorporation of steel or plastic balls embedded in either the base or both faces of the nut. When the fastener is subjected to external loads, these balls roll and redistribute the force, enabling the nut to withstand greater stress and thereby achieving a locking effect.