
unit: mm
P major diameter of external threadsdmaxdminTdmax dminbar diameterT P major diameter of external threadsdmaxdminTdmax dminbar diameterT
d d d d
Size (ref.) Size (ref.)
ISO old JIS ISO old JIS
| d max | d min | d max | d min | ISO | old JIS | d max | d min d max d min ISO | old JIS | |||
| M1 | ×0.25 | 1.000 | 0.933 | 0.985 | 0.940 | 0.95 | 0.95 | M9 | ×0.75 8.978 | 8.830 8.970 8.838 8.87 | 8.87 |
| M1 | ×0.2 | 1.000 | 0.944 | 0.980 | 0.930 | 0.96 | 0.94 | M10 ×1.5 | 9.968 | 9.770 9.960 9.732 9.79 | 9.82 |
| M1.1×0.25 | 1.100 | 1.033 | 1.100 | 1.033 | 1.05 | 1.05 | M10 ×1.25 | 9.972 | 9.810 9.960 9.760 9.81 | 9.85 | |
| M1.1×0.2 | 1.100 | 1.044 | 1.100 | 1.044 | 1.06 | 1.06 | M10 ×1 | 9.974 | 9.820 9.970 9.794 9.84 | 9.86 | |
| M1.2×0.25 | 1.200 | 1.133 | 1.185 | 1.140 | 1.15 | 1.15 | M10 ×0.75 | 9.978 | 9.838 9.978 9.838 9.87 | 9.87 | |
| M1.2×0.2 | 1.200 | 1.144 | 1.180 | 1.130 | 1.16 | 1.14 | M11 ×1.5 | 10.968 10.732 10.968 10.732 | 10.79 | 10.79 | |
| M1.4×0.3 | 1.400 | 1.325 | 1.380 | 1.320 | 1.34 | 1.34 | M11 ×1 | 10.974 10.794 10.970 10.820 | 10.84 | 10.86 | |
| M1.4×0.2 | 1.400 | 1.344 | 1.380 | 1.330 | 1.36 | 1.34 | M11 ×0.75 | 10.978 10.838 10.978 10.838 | 10.87 | 10.87 | |
| M1.6×0.35 | 1.581 | 1.496 | 1.581 | 1.496 | 1.52 | 1.52 | M12 ×1.75 | 11.966 11.701 11.950 11.760 | 11.8 | 11.8 | |
| M1.6×0.2 | 1.583 | 1.527 | 1.583 | 1.527 | 1.54 | 1.54 | M12 ×1.5 | 11.968 11.732 11.960 11.790 | 11.8 | 11.8 | |
| M1.7×0.35 | 1.681 | 1.596 | 1.680 | 1.610 | 1.62 | 1.63 | M12 ×1.25 | 11.972 11.760 11.972 11.760 | 11.8 | 11.8 | |
| M1.7×0.2 | 1.683 | 1.627 | 1.680 | 1.630 | 1.64 | 1.64 | M12 ×1 | 11.974 11.794 11.960 11.810 11.84 | 11.85 | ||
| M1.8×0.35 | 1.781 | 1.696 | 1.781 | 1.696 | 1.72 | 1.72 | M14 ×2 | 13.962 13.682 13.950 13.740 | 13.8 | 13.8 | |
| M1.8×0.2 | 1.783 | 1.727 | 1.783 | 1.727 | 1.74 | 1.74 | M14 ×1.5 | 13.968 13.732 13.960 13.790 | 13.8 | 13.8 | |
| M2 | ×0.4 | 1.981 | 1.886 | 1.980 | 1.890 | 1.91 | 1.91 | M14 ×1 | 13.974 13.794 13.960 13.810 13.84 | 13.85 | |
| M2 | ×0.25 | 1.982 | 1.915 | 1.980 | 1.930 | 1.93 | 1.94 | M15 ×1.5 | 14.968 14.732 14.960 14.790 | 14.8 | 14.8 |
| M2.2×0.45 | 2.180 | 2.080 | 2.180 | 2.080 | 2.11 | 2.11 | M15 ×1 | 14.974 14.794 14.960 14.810 14.84 | 14.85 | ||
| M2.2×0.25 | 2.182 | 2.115 | 2.182 | 2.115 | 2.13 | 2.13 | M16 ×2 | 15.962 15.682 15.950 15.740 | 15.8 | 15.8 | |
| M2.3×0.4 | 2.281 | 2.186 | 2.280 | 2.190 | 2.21 | 2.21 | M16 ×1.5 | 15.968 15.732 15.960 15.790 | 15.8 | 15.8 | |
| M2.3×0.25 | 2.282 | 2.215 | 2.280 | 2.230 | 2.23 | 2.24 | M16 ×1 | 15.974 15.794 15.960 15.810 15.84 | 15.85 | ||
| M2.5×0.45 | 2.480 | 2.380 | 2.480 | 2.380 | 2.41 | 2.41 | M17 ×1.5 | 16.968 16.732 16.968 16.732 | 16.8 | 16.8 | |
| M2.5×0.35 | 2.481 | 2.396 | 2.481 | 2.396 | 2.42 | 2.42 | M17 ×1 | 16.974 16.794 16.974 16.794 16.84 | 16.84 | ||
| M2.6×0.45 | 2.580 | 2.480 | 2.580 | 2.480 | 2.51 | 2.51 | M18 ×2.5 | 17.958 17.623 17.950 17.710 | 17.7 | 17.8 | |
| M2.6×0.35 | 2.581 | 2.496 | 2.580 | 2.480 | 2.52 | 2.51 | M18 ×2 | 17.962 17.682 17.950 17.650 | 17.8 | 17.7 | |
| M3 | ×0.5 | 2.980 | 2.874 | 2.980 | 2.874 | 2.90 | 2.90 | M18 ×1.5 | 17.968 17.732 17.950 17.780 | 17.8 | 17.8 |
| M3 | ×0.35 | 2.981 | 2.896 | 2.980 | 2.880 | 2.92 | 2.91 | M18 ×1 | 17.974 17.794 17.960 17.810 17.84 | 17.85 | |
| M3.5×0.6 | 3.479 | 3.354 | 3.470 | 3.360 | 3.39 | 3.39 | M20 ×2.5 | 19.958 19.623 19.950 19.710 | 19.7 | 19.8 | |
| M3.5×0.35 | 3.481 | 3.396 | 3.480 | 3.380 | 3.42 | 3.41 | M20 ×2 | 19.962 19.682 19.950 19.650 | 19.8 | 19.7 | |
| M4 | ×0.7 | 3.978 | 3.838 | 3.978 | 3.838 | 3.87 | 3.87 | M20 ×1.5 | 19.968 19.732 19.950 19.780 | 19.8 | 19.8 |
| M4 | ×0.5 | 3.980 | 3.874 | 3.970 | 3.860 | 3.90 | 3.89 | M20 ×1 | 19.974 19.794 19.960 19.810 19.84 | 19.85 | |
| M4.5×0.75 | 4.478 | 4.338 | 4.470 | 4.340 | 4.37 | 4.37 | M22 ×2.5 | 21.958 21.623 21.950 21.710 | 21.7 | 21.8 | |
| M4.5×0.5 | 4.480 | 4.374 | 4.470 | 4.360 | 4.40 | 4.39 | M22 ×2 | 21.962 21.682 21.950 21.650 | 21.8 | 21.7 | |
| M5 | ×0.8 | 4.976 | 4.826 | 4.976 | 4.826 | 4.86 | 4.86 | M22 ×1.5 | 21.968 21.732 21.950 21.780 | 21.8 | 21.8 |
| M5 | ×0.5 | 4.980 | 4.874 | 4.970 | 4.860 | 4.90 | 4.89 | M22 ×1 | 21.974 21.794 21.960 21.810 21.84 | 21.85 | |
| M5.5×0.5 | 5.480 | 5.374 | 5.470 | 5.360 | 5.40 | 5.39 | M24 ×3 | 23.952 23.577 23.940 23.680 | 23.7 | 23.7 | |
| M6 | ×1 | 5.974 | 5.794 | 5.970 | 5.820 | 5.84 | 5.86 | M24 ×2 | 23.962 23.682 23.940 23.640 | 23.8 | 23.7 |
| M6 | ×0.75 | 5.978 | 5.838 | 5.970 | 5.850 | 5.87 | 5.88 | M24 ×1.5 | 23.968 23.732 23.950 23.780 | 23.8 | 23.8 |
| M7 | ×1 | 6.974 | 6.794 | 6.970 | 6.820 | 6.84 | 6.86 | M24 ×1 | 23.974 23.794 23.960 23.810 23.84 | 23.85 | |
| M7 | ×0.75 | 6.978 | 6.838 | 6.970 | 6.850 | 6.87 | 6.88 | M25 ×2 | 24.962 24.682 24.940 24.640 | 24.8 | 24.7 |
| M8 | ×1.25 | 7.972 | 7.760 | 7.960 | 7.790 | 7.81 | 7.83 | M25 ×1.5 | 24.968 24.732 24.950 24.780 | 24.8 | 24.8 |
| M8 | ×1 | 7.974 | 7.794 | 7.970 | 7.830 | 7.84 | 7.87 | M25 ×1 | 24.974 24.794 24.960 24.810 24.84 | 24.85 | |
| M8 | ×0.75 | 7.978 | 7.838 | 7.970 | 7.830 | 7.87 | 7.87 | M26 ×1.5 | 25.968 25.732 25.950 25.780 | 25.8 | 25.8 |
| M9 | ×1.25 | 8.972 | 8.760 | 8.960 | 8.790 | 8.81 | 8.83 | M27 ×3 | 26.952 26.577 26.940 26.680 | 26.7 | 26.7 |
| M9 | ×1 | 8.974 | 8.794 | 8.970 | 8.830 | 8.84 | 8.87 | M27 ×2 | 26.962 26.682 26.962 26.682 | 26.8 | 26.8 |
| M27 ×1.5 | 26.968 26.732 26.950 26.780 | 26.8 | 26.8 |
ISO tolerance area Class 6g (M1.6 and larger) 6h (M1.4 and smaller) old JIS 2nd class old JIS 2nd class ×
M27 1 26.974 26.794 26.974 26.794 26.84 26.84
・ISO : from table 2 JIS B0209-2 and from table 1 JIS B0209-3
・Old JIS : from the tolerable limit size and the tolerance of metric coarse threads (for 2nd M28 ×2 27.962 27.682 27.940 27.640 27.8 27.7
class external threads, JIS B 0209-1982 appendix 1, appendix 1 attachment 4. from the ×
M28 1.5 27.968 27.732 27.950 27.780 27.8 27.8
tolerable limit size and the tolerance of metric fine threads (for 2nd class external
| threads), JIS B 0211-1982 appendix, appendix attachment 4 | M28 ×1 | 27.974 27.794 27.960 27.810 27.84 | 27.85 | |
| M30 ×3.5 | 29.947 29.522 29.940 29.660 | 29.6 | 29.7 | |
| M30 ×3 | 29.952 29.577 29.952 29.577 | 29.7 | 29.7 |