The lowest price component in this Fr. Brake Master Cylinder (cbf600sa/na) parts-list fiche is the Screw,flat,4x12.
Some items from this specific schematic: Guide Comp,fr Brk, Hose Comp C,fr Br, Bolt,flange,6x12, Bolt,flange,6x35.
On this parts fiche the Washer,oil Bolt is the most specified component.