A sample from the products for the F-9 Front Fender include: Bolt,hex., 6x16, Stay B,fr.fender, Stay A,fr.fender, Washer,spg.,5mm.
The lowest price component in this F-9 Front Fender parts-list fiche is the Bolt,hex., 6x16.
In this schematic the "Washer,plain, 6mm" is used most often.