An OEM part sourced directly from the manufacturer, this part is sold individually. Washers help to spread the load, and prevent damage to the surface being fixed, or provide some sort of insulation such as electrical. Washers can also be important for preventing galvanic corrosion. This specific washer is commonly used with outdoor lawn equipment, and is compatible with the mowers and tractors that are listed below.
OEM stands for Original Equipment Manufacturer. Simply put, this means that the company who made your appliance is also supplying the replacement part for it.
