The Bolt-flanged-small,6x is the lowest priced item on this Front Master Cylinder(er500-a2∼a4) schematic.
Parts such as the Front Master Cylinder(er500-a2∼a4): Hose-brake,fr, Screw,4mm, Clamp,brake Hose, Switch,brake are included in the Er500a4 Er5 2000 Europe Uk Fr Fg Is Nr Sp Front Master Cylinder(er500-a2∼a4) parts fiche.
On this parts fiche the Washer,10.5x15x1.5 is the most specified component.
