This is an OEM part sourced directly from the manufacturer. The nylock nut is commonly found in snow throwers and lawn tractors from Murray and Snapper. This part is made of metal, and may be found in various locations in the machine, depending on model. Please be aware that there are different nuts used in the machine. Refer to the p...Read morearts diagram to be sure of ordering the correct part. You will require a wrench when replacing this item. The nylock nut is available as an individual replacement part.