This schematic depicts all components used in the Cx500t Turbo 1982 (c) Belgium Water Pump - Pulse Generator partslist.
On this parts fiche the Bolt,flange,6x25 is the most specified component.
A sample from the products for the Water Pump - Pulse Generator include: Body,water Pump, Washer Seal, 6mm, Oil Seal 18x28x6, Imp,water Pump.