With a quantity of four pieces, the Bolt-washer,8x20 is the most used part in the F-18 diagram.
ten components are listed in the schematic for this Z50j Monkey 2005 (5) Japan Ab27-150 F-18 .
Some items from this specific schematic: Arm Comp.,r.step, Arm Comp.,l.step, Bolt-washer,8x20, Bar Comp,step.