05-42RY02 (1000001 - 1999999) Toro Lawn Mower

This is a lock nut and it is used in a variety of outdoor lawn equipment. This lock nut has a nylon insert, making it a nyloc nut. The insert allows the nut to be resistant to turning caused by strong vibrations.

This is a screw for your lawn equipment. Most commonly used to secure the half-rotor to the blade in your machine. This part is a hex bolt, and requires a nut or a tapped hole.