The screw attaches to the caster fork. It is an original Toro and Lawn Boy part for use in lawn mowers and lawn tractors. This item is available as an individual replacement part. During replacement, it may require a wrench to help install this item correctly. It is made out of metal and will need to be replaced if it breaks or strips.
This is an authentic HHHH replacement part, sourced from the original manufacturer for use with outdoor power equipment. The special lock nut is used with several different types of equipment and the application of the nut can vary based on the model of the tool. This lock nut is available as an individual replacement part.