Some items from this specific schematic: Oil Cup Comp, Bolt,flange,6x10, Protector,oil Cup, Connector.
On this parts fiche the Washer,oil Bolt is the most specified component.
Of all the components that make up this Rr. Brake Master Cylinder (xl600vm/vn/vp/vr) the Screw Wash.,4x12 has the lowest price.