On this parts fiche the Nut is the most specified component.
Parts such as the Cylinder: Hose(5x8.2x600), Bolt,stud, Bolt, Stud 8x25 are included in the Rm85 2006 (k6) Usa (e03) Cylinder parts fiche.
The Cylinder assembly is constructed from several parts from which the Cylinderset is the most expensive.