With a quantity of eight pieces, the Screw Pan Head is the most used part in the CRANKCASE - CYLINDER YZ80A diagram.
Parts such as the Crankcase - Cylinder Yz80a: Plug Straigtscrew 367185880000, Nut, Gasket 367185680000, Screw Pan Head are included in the Yz80 Competition 1974 Usa Crankcase - Cylinder Yz80a parts fiche.