On this parts fiche the Screw is the most specified component.
The lowest price component in this Water Pump parts-list fiche is the Gasket 8.2x14x1 (nas).
Parts such as the Water Pump: Gasket 8.2x14x1 (nas), Seal,mechanical, Shaft,water Pump, Bolt,drain are included in the Lt-f500f Quad Runner 4wd 1999 (x) Usa (e03) Quadrunner Quad-runn Water Pump parts fiche.