On this parts fiche the Washer,oil Bolt is the most specified component.
Some items from this specific schematic: Adjust Bolt Set A, Nut,flange,6mm, Lever,r Strg.hndl, Screw,flat,4x12.
Of all the components that make up this Fr. Brake Master Cylinder (1) the Screw,flat,4x12 has the lowest price.