| Type | 
                            Diamètre nominal de vis | 
|---|---|
| 
                      		 FF10 | 16 | 
| 
                      		 FF12 | 16 | 
| 
                      		 FF15 | 20 | 
| 
                      		 FF20 | 25 | 
| 
                      		 FF25 | 32 | 
| 
                      		 FF30 | 40 | 
