The M6 steel flat washer is constructed of premium 304 stainless steel for superior durability and rust resistance. These 6 mm fender washer are designed to provide a larger bearing surface which helps prevent the nut or bolt head from tearing material and loosening due to vibration and corrosion. It has an inner diameter of 6 mm, outer diameter of 12 mm, and a thickness of 1.5 mm. This washer is suitable for use in homes, cars, and shops, as it distributes the load of fasteners on its surface and can also be used as a hardware washers, spring, gasket, or locking device. Steel flat washers.