This is an original replacement part sourced directly from the manufacturer. The hex nut is commonly found in Snapper lawn tractors and riding mowers. This part is made of metal, and is generally used in securing the pulley and mower blade assembly. Please be aware that there are different nuts used in the machine. Refer to the parts ...Read morediagram to be sure of ordering the correct part. You will require a wrench when replacing this item. The hex nut is sold individually.