The most reasonably priced component used on the Sfx50 2001 (1) Netherlands Mp Crankcase/oil Pump is the Clip,b65,tube.
Parts such as the Crankcase/oil Pump: Gasket A,in.pipe, Oil Pump Assy, Bolt,flange,6x85, O-ring,20.6x1.9 are included in the Sfx50 2001 (1) Netherlands Mp Crankcase/oil Pump parts fiche.
In this schematic the "Bolt,flange,6x28" is used most often.