On this parts fiche the Bolt, Hexagon Socket Head(4kg) is the most specified component.
A sample from the products for the Stand. Footrest include: Cover, Footrest, Cover, Footrest, Spring, Tension (4k0), Bolt, Hexagon Socket Head(4kg).
The component with the lowest price in the STAND. FOOTREST schematic is the Bolt, Flange(8ab).