With a quantity of four pieces, the Nut,hex.,10mm is the most used part in the SWINGARM diagram.
Some items from this specific schematic: Joint Comp,yoke, Bolt,flange,8x32, Stpr.,prop.shaft, Nut,rr.fork Pivot.
The Swingarm assembly is constructed from several parts from which the Arm Assy,swing is the most expensive.