The most reasonably priced component used on the Z50j3 Monkey 1990 (l) Finland Hp Air Cleaner is the Bolt-washer,6x16.
This AIR CLEANER assembly utilises two Screw-washer,5x12(s) - the highest specified component.
The sub assemblies and components that make up this Air Cleaner include this Case,air Cleaner, the most expensive part.