This is an authentic Toro replacement part. The flat washer is commonly found in a variety of Toro yard machines such as lawn mowers and snow throwers. The flat washer is generally used to provide space and protection between a nut or bolt head and a housing. Please be aware that there are different washers used in the machine. Refer ...Read moreto the parts diagram to be sure of ordering the correct part. You may require a wrench, screwdriver, or pliers to replace this item. This part is sold individually.