Piaggio Vespa Steering Bearing Locking Nut Vespa PX, T5, Cosa, Rally, PV, ET3, MP3, Liberty, LX, LXV, ET4, ET2
The Vespa/Piaggio Top nut is fitted to the Bearing race so that the bearings on the Fork Arm do not become loose.
Comparison Part No. 0111094 (PIAGGIO), SF534-1902 (LML)