ISO 4144
Forma:
1/8" - 1/2"   Esagono
3/4" - 2"  Ottagono
2 1/2" - 4"  Decagono
				
ISO 4144
Forma:
1/8" - 1/2"   Esagono
3/4" - 2"  Ottagono
2 1/2" - 4"  Decagono
				
| Size mm | 1/8" | 1/4" | 3/8" | 1/2" | 3/4" | 1" | 1 1/4" | 1 1/2" | 2" | 2 1/2" | 3" | 4" | 
| E | 5.5 | 8 | 11.5 | 15 | 20.5 | 26 | 34.5 | 40 | 51 | 65.5 | 77.5 | 102 | 
| J | 8 | 10.5 | 11 | 14.5 | 15.5 | 18 | 20.5 | 20.5 | 25 | 27 | 30 | 34.5 | 
| K | 4 | 4 | 5 | 5 | 5.5 | 6 | 6.5 | 6.5 | 7 | 7 | 7.5 | 9.5 | 
| U | 23 | 28 | 33 | 38 | 45 | 52 | 52 | 56 | 60 | 65 | 70 | 73 | 
| V | 4 | 5 | 7 | 10.5 | 16 | 22 | 27.5 | 34.5 | 46 | 59 | 71 | 95 | 
| T | 8 | 9 | 11 | 15 | 21 | 27 | 33 | 39.5 | 52 | 67 | 80 | 105 | 
| S | 11 | 15 | 18 | 22 | 28 | 35 | 44 | 50 | 61.5 | 78 | 90 | 117 |