nombres fractionnaires nombres métriques (mm)   nombres fractionnaires nombres métriques (mm)
1/8" 3,175 mm   1 3/4" 44,450 mm
1/4" 6,350 mm   2" 50,800 mm
3/8" 9,525 mm   2 1/4" 57,150 mm
1/2" 12,700 mm   2 1/2" 63,500 mm
5/8" 15,875 mm   2 3/4" 69,850 mm
3/4" 19,050 mm   3" 76,200 mm
7/8" 22,225 mm   3 1/4" 82,550 mm
1" 25,400 mm   3 1/2" 88,900 mm
1 1/4" 31,750 mm   3 3/4" 95,250 mm
1 1/2" 38,100 mm   4" 101,600 mm