Some items from this specific schematic: Cover Comp,l Rr, Dowel,pin,8x14, O-ring 32.95x2.62, Oil Seal,12x28x7.
The Bolt,flange,6x25 is the lowest priced item on this Water Pump schematic.
The Water Pump is made up of components including this Pump Comp,water which is the most expensive.