The component with the lowest price in the REAR CALIPER (GSF1200SAV/SAW/SAX) schematic is the Bolt.
A sample from the products for the Rear Caliper (gsf1200sav/saw/sax) include: Caliper Assembly,rear, Bolt, Shim,outer, Seal Set,piston.
In this schematic the "Bolt,housing" is used most often.