Of all the components used in this assembly the Cover,clutch is the most expensive.
In this schematic the "Screw-pan Head,6x20" is used most often.
A sample from the products for the Engine Covers ('82-'83 A9/a10) include: Gasket,carburetor Cov (mca), Screw-pan Head,6x30, Gasket,l.h Eng Cover (mca), Plug,oil Filler.