The component with the lowest price in the Footrests schematic is the Nut,flanged,6mm.
Some items from this specific schematic: Washer,6.5x16x1.0, Nut,flanged,6mm, Step,foot Peg,s.gold, Step,rh,s.gold.
This Footrests assembly utilises twenty-two Nut,flanged,6mm(s) - the highest specified component.