The lowest price component in this Fr. Brake Master Cylinder (cb1300/cb1300s) parts-list fiche is the Screw,flat,4x12.
In this schematic the "Washer,oil Bolt" is used most often.
Some items from this specific schematic: Cylin.set,master, Bolt,hndl Pivot, Screw,flat,4x12, Washer,oil Bolt.