Parts such as the Cylinder Head: Washer,10mm, Bolt,flange,6x28, Gasket,cylinder H, Bolt,stud 6x32 are included in the Gd321\vaa\10zg401 Cylinder Head parts fiche.
The Nut, Flang, 10mm is the lowest priced item on this Cylinder Head schematic.
Check out any of the twelve Cylinder Head components enlisted.
