In this schematic the "Screw" is used most often.
Parts such as the Front Master Cylinder: Plate, Screw, Diaphragm, Boot are included in the Dr800su 1994 (r) Germany (e22) Front Master Cylinder parts fiche.
The Dr800su 1994 (r) Germany (e22) Front Master Cylinder consists of ten pieces with the Cylinder Assembly,front Master being the most expensive.