M10x1.25 x 13 nut for the flywheel of the following mopeds / mopeds with Beta 521 engine:
The flywheel nut with reduced 15 mm key width has a fine thread.
Original Pony spare part number: A8014
| Manufacturer | Pony | 
| Material | Steel | 
| Surface | galvanized (blue) | 
| Nut type | Hexagon nut | 
| Thread type | MF10x1.25 (fine pitch thread) | 
| Width across flats | 15 mm | 
| Height | 13 mm | 
| Drive | External hexagon | 
| Pony OEM number | A8014 | 
| Pony / Cilo (Beta 521 & 512) | Beta 512 Beta 521 (engine) | 
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