On this parts fiche the Bolt is the most specified component.
Some items from this specific schematic: Rubber,fr Footrest, Screw(5x16), Plate,pillion Footrest,l, Bracket,pillion Footrest,l.
This Footrest diagram displays the required parts for the Vl1500 Boulevard C90 2006 (k6) Usa (e03) Footrest.