The lowest price component in this Thermostat parts-list fiche is the Bolt,flange,6x25.
Some items from this specific schematic: O-ring,30mm, Wash,special,12mm, Cover,thermostat, Bolt,flnage,6x35.
This Thermostat diagram displays the required parts for the Cbr600ra 2011 (b) Brazil / Abs Thermostat.