Locking Washer

A specialized washer used in preload adjustment mechanisms to secure fasteners against rotational loosening caused by vibration, thermal cycling, and dynamic operational forces. It functions by creating frictional resistance or mechanical interference between the fastener and mating surface, ensuring consistent preload maintenance critical for precision machinery alignment and performance.

Works by generating axial tension and radial expansion when compressed under a fastener, creating spring-like action that maintains clamping force. Some designs feature teeth or serrations that bite into mating surfaces, providing mechanical locking through deformation or interference fit.