The lowest price component in this E-17 Cylinder Block parts-list fiche is the Screw,tapping,4x8.
Parts such as the E-17 Cylinder Block: Bolt,flange,6x20, Pl,trans.holder, Bolt,flange, 6x32, Crankcase, R. are included in the Cx500tc 1982 (c) E-17 Cylinder Block parts fiche.
On this parts fiche the Bolt,flange,8x25 is the most specified component.