The most reasonably priced component used on the 50err (50elrr) 1993 Optional Parts Rigging Accessories Comp. Parts is the Pin, Spring (6h4).
In this schematic the "Screw(6k0)" is used most often.
The fifty 50err (50elrr) 1993 Optional Parts Rigging Accessories Comp. Parts component parts are all listed in this schematic.