Advantages of flat washers: Flat washers provide a larger bearing surface that helps prevent the nut or bolt head from tearing material and preventing loosening due to vibration and corrosion.
Used in outdoor or humid environment, more corrosion resistant and more acid resistant than ordinary stainless steel.
Suitable for homes, cars and shops, it distributes the load of the fasteners on the surface and you can use it as a gasket, spring, gasket or locking device.