The lowest price component in this Frame / Oil Cooler parts-list fiche is the Washer,plain, 8mm.
The Bolt,flange,8x62 is the most widely applied product in the CB900F 900 SUPER SPORT 1981 (B) USA FRAME / OIL COOLER ( seven times ).
Some items from this specific schematic: Washer,plain,6mm, Brkt,rr.eng Hange, Bolt,flange,6x35, Collar,rod Pivot.