Woodruff key / disc spring for securing the pinion.
Also suitable for the flywheel on the crankshaft.

Used in the following mopeds with Beta 521 engine:

• Cilo Cross 521 & 512
• Pony Cross 521
• Pony GTX 521

Dimensions:
Length: 9.7 mm
Height: 3.7 mm
Width: 3 mm