The Tz125 1999 4jt6 Germany 294jt-100e1a Rear Arm consists of twenty pieces with the Rear Arm Comp. being the most expensive.
On this parts fiche the Collar(4dp) is the most specified component.
Some items from this specific schematic: Nut, Self-locking(38v), Arm, Relay, Rear Arm Comp., Bearing, Cylindrical (23x).