On this parts fiche the Washer,oil Bolt is the most specified component.
Parts such as the F-4 Front Brake Master Cylinder: Screw,flat,4x12, Bolt,hndl Pivot, Hose,fr.brake, Bolt,oil,10x22 are included in the Vf400f 1983 (d) F-4 Front Brake Master Cylinder parts fiche.
The F-4 Front Brake Master Cylinder assembly is constructed from several parts from which the Cylin,fr.brk.mas is the most expensive.