Stainless steel spring washers, also known as lock washers, are elastic ring-shaped fasteners with a split cut. They are installed between the nut and workpiece to create spring tension and stop threaded connections from loosening under vibration.
Made of 304 or 316 stainless steel, these washers feature good elasticity and corrosion resistance. When tightened, the split ends press against the mating surfaces to generate friction, effectively preventing loosening caused by vibration or thermal expansion. They are widely used in machinery, automotive, pipeline and outdoor equipment assemblies.