Description

Flywheel nut
M12 x 1.50 collar Ø=33.5mm h=4.5mm WS=17 OEM QUALITY
Vespa GS160 / GS4 (VSB1T),
SS180 (VSC1T),
Rally180 (VSD1T),
Rally200 (VSE1T, Femsatronic)

Flanged type flywheel nut M12 x 1.5mm thread, 17mm hex with a 33.5mm flange, use with flywheel circlip 

https://www.ebay.co.uk/itm/164070289476

and locking washer 

https://www.ebay.co.uk/itm/164428700993 

OEM numbers (for comparison purposes only)

Piaggio 77379, 077379

Vespa (Piaggio) Vespa 180 Rally (VSD1T)

 Vespa (Piaggio) Vespa 200 Rally (VSE1T, Femsa)

 Vespa (Augsburg) Vespa 160 GS/4 (type 382, VSB1T)

 Vespa (Piaggio) Vespa 160 GS/4 (VSB1T, 1963, GS4)

 Vespa (Piaggio) Vespa 180 Super Sport (VSC1T, SS180)