The principles of nut anti-loosening are mainly divided into three categories: friction anti-loosening, mechanical anti-loosening, and permanent anti-loosening:
Friction anti-loosening: Preventing loosening by increasing the friction between the threads (e.g., spring washers, self-locking nuts, double nuts).
Mechanical anti-loosening: Directly restricting the rotation of the threaded pair using locking devices (cotter pins, locking washers).
Permanent anti-loosening: Making the connection irreversible by damaging the threads (punching, welding) or bonding (applying adhesive).
The nut consists of two parts, each with interlocking cams. Due to the internal wedge-shaped design with a slope angle greater than the nut angle of the bolt, this combination tightly locks together as a whole. When vibration occurs, the raised parts of the DISC-LOCK anti-loosening nut move against each other, generating lifting tension, thus achieving a perfect anti-loosening effect.
Friction anti-loosening is the most widely used method, creating a continuous positive pressure between the threaded pair to generate friction that prevents relative rotation.
Mechanical anti-loosening restricts the relative rotation of the nut and bolt through an external mechanical device, physically preventing loosening.