These forgefix heavy duty form a flat washers are thicker than the more popular form b type washers they are bright zinc plated for increased corrosion resistance and conform to din 125 standards washers provide a smooth surface for the nut or bolt to bear on making it less likely to loosen as a result of an uneven fastening surface the main purpose of a washer is to distribute the load under a bolt head or the nut face applicationon all manner of bolting applications can be used with all types