Parts such as the Cam Chain / Tensioner: Nut,lock 20mm, Chain,cam, Chain Guide Plate, Pin, Tensioner are included in the Cx500d Deluxe 1980 (a) Usa Cam Chain / Tensioner parts fiche.
The most reasonably priced component used on the Cx500d Deluxe 1980 (a) Usa Cam Chain / Tensioner is the Pin,lock 6mm.
This CAM CHAIN / TENSIONER assembly utilises three Bolt,flange,6x16(s) - the highest specified component.