Parts such as the Cylinder Head: Gasket (nas), Clip, Pin, Dowel, Bolt, Washer Based (5h0) are included in the Xg250 2005 4d61 Austria 1d4d6-352s1 Cylinder Head parts fiche.
In this schematic the "Washer, Plate" is used most often.
The Cylinder Head is made up of components including this Cylinder Head Assy which is the most expensive.