The Bolt,stud 2,6x18 is the cheapest item from this partsfiche.
Some items from this specific schematic: Gasket,carb.insul, Bolt,stud 2,6x18, Guide,inlet Valve, Bolt,flange,6x65.
With a quantity of six pieces, the Nut,flange,6mm is the most used part in the E-2 diagram.