steel 8.8 black Grade A – perfect repair Product description Whoever maintains and works on their scooter themselves should make sure a supply of suitable fastenings, gaskets, etc. are available in your workshop all times. What can be more annoying then being in the middle of a complete engine rebuild or similar to be stopped in your tracks by the lack of any particular nut or bolt OEM numbers (for comparisons): S.8421 – 008421 – 239151 out of production (PIAGGIO)