The screw attaches to the baffle and is made out of metal. This is available as an individual replacement part. This item is an OEM from Toro and Lawn Boy for use in lawn mowers and lawn tractors. A wrench might be needed during the installation process. It will require replacing if it strips or breaks.
The thrust washer is made of metal and goes next to the spring washer. This is a genuine replacement part sourced from the original manufacturer for use with lawn tractors made by Toro and Lawn Boy. This item is available as an individual replacement. During the installation process, a screwdriver might be needed to replace this part. It will need to be replaced if it breaks.