On this parts fiche the Nut is the most specified component.
Parts such as the Cylinder: Pin, Gasket,cylinder,rear (nas), Gasket,cylinder Rr (nas), Gasket,cylinder Fr (nas) are included in the Tl1000s 1999 (x) (e02 E04 E18 E22 E24 E25 E34) Cylinder parts fiche.
The Cylinder assembly is constructed from several parts from which the Cylinder,front is the most expensive.