Nut flat type -PIAGGIO, similar to DIN 934- M12 x 1.25 - WS=19 - used as clutch nut for clutch bell Piaggio LEM engine Fly125, Liberty125/150, Medley 125/150, Vespa GTS125/150 iGet, LX125/150 i.e. 3V, Primavera 125/150 i.e. 3V, S125/150 i.e. 3V, Sprint 12