A sample from the products for the Rear Brake include: Spring,pad, Pad-assy-brake (nas), Caliper-sub-assy,rr,b, Bolt,socket,8x20.
Of all the components used in this assembly the Caliper-sub-assy,rr,b is the most expensive.
In this schematic the "Bolt,socket,8x30" is used most often.