On this parts fiche the Bolt,flange, 6x32 is the most specified component.
Parts such as the Lower Crankcase: Dowel,pin,10x16, Bolt,flange, 6x32, Element Set,oil, Bolt,hex 8x135 are included in the Cb450sc Nighthawk 1985 (f) Usa California Lower Crankcase parts fiche.
The most expensive part in this assembly is the Crankcase,lower.