On this parts fiche the Bolt(6x30) is the most specified component.
The most reasonably priced component used on the Lt-z400z Quad Sport 2005 (k5) Usa (e03) Quadsport Quad-sport Water Pump (model K5/k6/k7) is the Washer.
This Pump Assy,wate is the most expensive of the items that make up this Water Pump (model K5/k6/k7) assembly.