Parts such as the Rear Arm - Rear Cushion - Chain Case: Nipple, Grease(6a1), Nut, Rear Arm Comp, Nut, Cap (371) are included in the Tx500 1973 Usa Rear Arm - Rear Cushion - Chain Case parts fiche.
The most expensive part in this assembly is the Shk/abs Asy,rear.