Parts such as the Oil Pump: Valve-assy-relief, Wire-lead, Spring, Washer,20.5x30x1 are included in the Kle250-a3 1997 Greece Oil Pump parts fiche.
With three applications this Bolt-flanged-small is the most specified part.
The Oil Pump assembly is constructed from several parts from which the Pump-assy-oil is the most expensive.