1+ Fuel filler cap  
2+ Blank key  
3+ Fuel filler cap  
4+ Clamp ring  
5+ Grommet  
6+ Setscrew  
7+ Fuel filler pipe  
8+ Support bracket  
9+ Shakeproof washer  
10+ Locknut  

The part numbers in the assembly image below relate to the product number in the table. Clicking on the part number will open up the relevant part details.