Of all the components that make up this Cylinder Head Cover the Bolt Flang 6x20 has the lowest price.
In this schematic the "Bolt,flange,6x30" is used most often.
Parts such as the Cylinder Head Cover: O-ring 44x3, Bolt,flange,6x30, Gasket,head Cover (nas), Washer,mount Rub are included in the Xl600v Transalp 1987 (h) France / Cylinder Head Cover parts fiche.