The Screw-pan Head,6x20 is the most widely applied product in the KM100-A4 1979 USA CANADA / MPH KPH CRANKCASE (KM100-A3-) ( six times ).
Check out any of the thirty-seven Crankcase (km100-a3-) components enlisted.
A sample from the products for the Crankcase (km100-a3-) include: Ring-o,7.8x3.5, Screw-pan Head,6x20, Screw-pan Head,6x60, Bushing,l=23.5.