In this schematic the "Bolt,flange,6x60" is used most often.
This part-list fiche shows all the components that make up the Cn250 Helix 1994 (r) Italy Kph Crankcase .
The most reasonably priced component used on the Cn250 Helix 1994 (r) Italy Kph Crankcase is the Bolt,hex.,6x12.