The Bolt,hex 6x12 is the lowest priced item on this E-9 Crankcase schematic.
This E-9 CRANKCASE assembly utilises eight Bolt,flange, 6x32(s) - the highest specified component.
Some items from this specific schematic: Set Ring,72mm, Bolt,flange,6x75, Crankcase,lower, Bolt,flange,6x40.