Parts such as the Frame: Bolt,hex 6x8, Emb, Frame (type2), Bolt,hex 6x8, Holder,helmet are included in the C70 Passport 1980 (a) Usa Frame parts fiche.
Of all the components used in this assembly the Frame *y31* is the most expensive.
The component with the lowest price in the FRAME schematic is the Bolt,hex 6x8.