On this parts fiche the Screw is the most specified component.
The component with the lowest price in the MASTER CYLINDER schematic is the Screw.
Parts such as the Master Cylinder: Cylinder Assy, Master, Holder, Screw, Bolt are included in the Gs450e 1988 (j) (e04 E22 E34 E75 E77) Master Cylinder parts fiche.