Some items from this specific schematic: Nut,cap, Bolt, Bearing(30x55x17), Washer(22.5x32x1.6).
The Steering Stem (model W/x/y/k1/k2) is made up of components including this Stem,steering which is the most expensive.
The component with the lowest price in the STEERING STEM (MODEL W/X/Y/K1/K2) schematic is the Bolt.