Rosca Métrica Fina (MF) Diámetro Paso mm mm Máximo Diámetro del Núcleo Mínimo Diámetro de la Broca mm 3 0.35 7.721 2.621 2.65 3.5 0.35 3.221 3.121 3.15 4 0.5 3.599 3.459 3.50 5 0.5 4.599 4.459 4.50 6 0.75 5.378 5.188 5.20 7 0.75 6.378 6.188 6.20 8 0.75 7.378 7.188 7.20 8 1 7.153 6.917 7.00 9 0.75 8.378 8.188 8.20 9 1 8.153 7.917 8.00 10 0.75 9.378 9.188 9.20 10 1 9.153 8.917 9.00 10 1.25 8.912 8.647 8.80 12 1 11.153 10.917 11.00 12 1.25 10.912 10.647 10.80 12 1.5 10.676 10.376 10.50 14 1 13.153 12.917 13.00 14 1.25 12.912 12.647 12.80 14 1.5 12.676 12.376 12.50 16 1 15.153 14.917 15.00 16 1.5 14.676 14.376 14.50 18 1 17.153 16.917 17.00 18 1.5 16.676 16.376 16.60 18 2 16.210 15.835 16.00 20 1 19.153 18.917 19.00 20 1.5 18.676 18.376 18.50 20 2 18.210 17.835 18.00 22 1 21.153 20.917 21.00 22 1.5 20.676 20.376 20.50 22 2 20.210 19.835 20.00 24 1 23.153 22.917 23.00 24 1.5 22.676 22.376 22.50 24 2 22.210 21.835 22.00 26 1.5 24.676 24.376 24.50 28 1 27.153 26.917 27.00 28 1.5 26.676 26.376 26.50 28 2 26.210 25.835 26.00 30 1 29.153 28.917 29.00 30 1.5 28.676 28.376 28.50 30 2 28.210 27.835 28.00 30 3 27.252 26.752 27.00