The Thermostat is made up of components including this Thermo Unit Assy which is the most expensive.
The Bolt,flange,6x40 is the cheapest item from this partsfiche.
With all the components that make up the GL1200A GOLDWING ASPENCADE 1986 (G) USA CALIFORNIA THERMOSTAT assembly. The O-ring 21.9x2.5 is the most frequently specified with four applications.