The Screw is the cheapest item from this partsfiche.
The eighteen Gsf1200 2000 (y) (e02 E04 E18 E22 E24 E25 E34) Clutch Master Cylinder component parts are all listed in this schematic.
Parts such as the Clutch Master Cylinder: Clamp(l:125), Bolt,crkcase,r, Boot, Piston & Cup Set are included in the Gsf1200 2000 (y) (e02 E04 E18 E22 E24 E25 E34) Clutch Master Cylinder parts fiche.