The lowest price component in this Clutch Master Cylinder parts-list fiche is the Screw.
In this schematic the "Washer(10x15x1.5)" is used most often.
The sixteen Vl1500 1998 (w) (e02 E04 E17 E18 E22 E24 E25 E34) Clutch Master Cylinder component parts are all listed in this schematic.