1+ Radius arm  
2+ .Radius arm bush  
3+ .Radius arm bush  
4+ Safety strap  
5+ Washer  
6+ Hexagon head setscrew  
7+ Bolt  
8+ Special bolt  
9+ Plain washer  
10+ Tab washer  

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.