On this parts fiche the Bolt(6j9) is the most specified component.
A sample from the products for the Lower Casing - Drive 3 include: Propeller (ss 3x14"x27"-mf), Clamp (6e5), Damper Rubber, Propeller, Cover, Water Inlet.
The most expensive part in this assembly is the Propeller (ss 3x13"x25"-mr).