Nut set for wheel shaft / gearbox output shafts for scooter with 125cc and 150cc Piaggio 2-stroke engines up to year 1999 such as such as Piaggio Hexagon, Sfera, SKR, TPH or Vespa ET4. The set consists of nut, retaining pin and safety cap. OEM-No. for comparison purposes: 194424 / 563728 / 012787 / 012789 / AP8550307