The Bolt(6x16) is the lowest priced item on this Rear Wheel (vzr1800z L2 E33) schematic.
Some items from this specific schematic: Spacer,rr Axle,r, Wheel,rr(18m/cxmt8.50), Bolt(8x21), Balancer,wheel(10g).
The most expensive part in this assembly is the Wheel,rr(18m/cxmt8.50).