The lowest price component in this Cylinder Head Cover parts-list fiche is the Bolt-flanged-small.
Parts such as the Cylinder Head Cover: Cover,cylinder Head,f, Gasket,cylinder Head (mca), Bolt-flanged-small, Bolt-flanged-small are included in the Z550g2 Gt550 1984 United Kingdom Fr Fg Cylinder Head Cover parts fiche.
In this schematic the "Bolt-flanged-small" is used most often.