Classification Of Anti-loosening Nut Technologies

Engineered Plastic Coating: A specialized engineered plastic (such as nylon) is permanently bonded to the inner threads of the nut. When tightened, the plastic is compressed, generating a reactive force that significantly increases the friction between the internal and external threads, thereby creating resistance to vibration. This resistance is distributed uniformly across the entire threaded engagement section and remains independent of the clamping pressure; thus, the frictional force persists even if the screw loosens slightly.

 

Double-Nut Structure: This design employs a combination of left-hand and right-hand threaded nuts tightened in tandem. The resulting axial force generated between the two nuts increases the friction between the threads, effectively preventing self-loosening.

 

Self-Locking Mechanism: This category includes nuts featuring elements such as embedded nylon rings, crimped collars, or integrated metal anti-loosening devices. Through a specific locking mechanism, the nut engages with the bolt; it locks securely into place during tightening and disengages during loosening, thereby achieving a self-locking function.

 

Threadlocking Adhesive: An adhesive-typically an acrylate or methacrylate compound-is applied to the threaded joint assembly. Upon tightening, the adhesive cures to form a dual physical and chemical bond, providing a robust locking effect that is particularly well-suited for applications involving high levels of vibration.