The Screw,washer,5x16 is the lowest priced item on this Air Cleaner schematic.
On this parts fiche the Screw,washer,5x16 is the most specified component.
A sample from the products for the Air Cleaner include: Screw,washer,5x16, Clip,brthr.tube, Tube R,sub Air/c, Tube,l.sub Air Cl.