How to prevent Four Slot Nuts from loosening?

1. Friction anti-loosening
Use spring washers: After installing the spring washers, the nuts will flatten the washers during the tightening process. The rebound force of the spring washers is upward, so that the threads maintain the compression and friction forces, thereby preventing loosening.
Top nuts: Two nuts are tightened top to top, so that the threaded connection pair is always subjected to additional tension and friction forces to achieve the anti-loosening effect.
2. Mechanical anti-loosening
Slotted nuts are used in conjunction with cotter pins: After tightening the nuts, insert the cotter pins into the holes of the nut slot and the tail of the bolt, and then pull the tail of the cotter pin apart to prevent the relative rotation of the nut and the bolt.
Stop washers: Use the tongue of the stop washers to prevent the bolts or nuts from rotating to prevent loosening.
3. Locking nuts
All-metal locking nuts: Through the deformation of the bottom hole of the thread or the deformation of the thread tooth shape, when matching with the bolt, an interference fit relationship is generated between the threads, thereby increasing the friction between the threads and achieving the purpose of preventing loosening.
Nylon embedded nut: a nylon ring is embedded in the nut, and the nylon ring fits tightly with the bolt thread to generate friction and prevent the nut from loosening.
4. Other anti-loosening measures
Thread lock glue: Apply thread lock glue to the threaded connection part. After curing, the bolt and nut can be connected as one to prevent loosening.
Control preload: By using a torque wrench or a fixed torque wrench, ensure that the bolt and nut reach the appropriate preload to enhance the reliability and tightness of the connection.
5. Special structure of four-slot nut
Four-slot nut ring structure: The four-slot nut ring is pulled inward along the entire circumference by a spring, and the corresponding thread will exert greater force on the screw thread. The entire component is made of all-metal, and the clamping force remains unchanged even after repeated use.