Of all the components that make up this Water Pipe / Thermostat the Bolt,flange,6x14 has the lowest price.
A sample from the products for the Water Pipe / Thermostat include: Seal,water Pipe,2, Pipe R,water Outl, Case,thermostat, Sw.assy.,thermo.
In this schematic the "Bolt,flange,6x25" is used most often.