The Bolt,6x10 is the cheapest item from this partsfiche.
Parts such as the Air Cleaner/muffler ('71-'72 F8/: Washer-plain,6mm, Bolt,flanged,8x35, Washer-spring,6mm, Washer-spring,6mm are included in the F81m 1971 Usa Air Cleaner/muffler ('71-'72 F8/ parts fiche.
This schematic depicts all components used in the F81m 1971 Usa Air Cleaner/muffler ('71-'72 F8/ partslist.