呼び ドリル径 Max. Min.
M1×0.25 0.75 0.785 0.729
M1.1×0.25 0.85 0.885 0.829
M1.2×0.25 0.95 0.985 0.929
M1.4×0.3 1.1 1.142 1.075
M1.6×0.35 1.25 1.321 1.221
M1.7×0.35 1.35 1.421 1.321
M1.8×0.35 1.45 1.521 1.421
M2×0.4 1.6 1.679 1.567
M2.2×0.45 1.75 1.838 1.713
M2.3×0.4 1.9 1.979 1.867
M2.5×0.45 2.1 2.138 2.013
M2.6×0.45 2.2 2.238 2.113
M3×0.5 2.5 2.599 2.459
M3.5×0.6 2.9 3.010 2.850
M4×0.7 3.3 3.422 3.242
M4.5×0.75 3.8 3.878 3.688
M5×0.8 4.2 4.334 4.134
M6×1 5.0 5.153 4.917
M7×1 6.0 6.153 5.917
M8×1.25 6.8 6.912 6.647
M9×1.25 7.8 7.912 7.647
M10×1.5 8.5 8.676 8.376
M11×1.5 9.5 9.676 9.376
M12×1.75 10.3 10.441 10.106
M14×2 12.0 12.210 11.835
M16×2 14.0 14.210 13.835
M18×2.5 15.5 15.744 15.294
M20×2.5 17.5 17.744 17.294
M22×2.5 19.5 19.744 19.294
M24×3 21.0 21.252 20.752
M27×3 24.0 24.252 23.752
M30×3.5 26.5 26.771 26.211
M33×3.5 29.5 29.771 29.211
M36×4 32.0 32.270 31.670
M39×4 35.0 35.270 34.670
M42×4.5 37.5 37.799 37.129
M45×4.5 40.5 40.799 40.129
M48×5 43.0 43.297 42.587