The Bolt,hex.,6x16 is the lowest priced item on this E-6 schematic.
A sample from the products for the E-6 include: Clip,2x70, Oil Seal,20x32x7, Washer,14.2x30.5, Bolt,flange,6x55.
The E-6 assembly is constructed from several parts from which the Crank Case Comp,l is the most expensive.