This is an original Jet replacement part. The hex nut is designed by the manufacturer for use in power tools such as jointers, planers, band saws, and sanders. 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 hex nuts used in the machine. Refer to the parts diagram to be sure of ordering the correct part. You will require a wrench when replacing this item. This product is sold individually. For Use With: Jet 15S (1791210) 15" Spiral Cutterhead Planer 15HH (1791213) 15" Helical Cutterhead Planer ...