The Bolt is the lowest priced item on this Air Cleaner schematic.
Parts such as the Air Cleaner: Joint, Air Cleaner 1, Washer, Plate (898 C/case), Bolt, Clamp, Hose are included in the Srx600sc 1986 Air Cleaner parts fiche.
The Air Cleaner is made up of components including this Air Cleaner Case Assy which is the most expensive.