This is a Manufacturer Approved replacement nut for lawn and garden equipment. This item is Metal an is Sold Individually. A lock nut is a type of nut that resists loosening when properly threaded onto a bolt.

Authentic Manufacturer Sourced replacement part used on a variety of Lawn and Garden Equipment. This part is made out of Plastic and it is Sold Individually. This part allows a shaft to connect and move smoothly and freely.

This is a Genuine Manufacturer Approved replacement part used on a variety of Lawn and Garden Equipment. This screw has different applications depending on your equipment. This item is made out of Metal and is Sold Individually. Requires a Wrench to tighten or loosen.

This is a Genuine Manufacturer Approved replacement part used on Troy-Bilt Lawn Mowers. This Wheel is made out of Plastic and it is Sold Individually. Please note: The Axle Bolt and Wave Washer that secures this wheel is Sold Separately.

This is the Genuine Manufacturer Sourced replacement Drive Belt that drives the transmission which propels the lawn mower wheels. This part is made out of Rubber and it is Sold Individually. Clean the pulleys off before installing the new belt to ensure top performance and longevity with your new belt. Inspect belts periodically and replace them when worn to maintain peak performance.

This is a genuine OEM replacement part, it is sold individually.
This is the front wheel on the models shown below.
There are two of them on each mower.
The wheel has a ring gear on the inside which is driven by the Right hand and Left hand smaller gear that attaches to the front axle on the transmission assembly.