With a quantity of four pieces, the Screw,4x8 is the most used part in the SWING ARM/CHAIN CASE diagram.
A sample from the products for the Swing Arm/chain Case include: Collar,chain Slid, Cap.dust Seal, Case,drive Chain, Screw,tapping,6x1.
The lowest price component in this Swing Arm/chain Case parts-list fiche is the Screw,4x8.