A sample from the products for the Cylinder Head Cover - Camcase include: Bolt,hex 6x8, Pin,knock 11x18, Gasket,cam.case (mca), Gasket B,cyl.head (nas).
On this parts fiche the Washer,sealing is the most specified component.
The component with the lowest price in the CYLINDER HEAD COVER - CAMCASE schematic is the Washer,6mm.