
unit: mm
| Size | major d IS | iameter o O | f external old | threads JIS | bar di (r | ameter ef.) |
| dmax | dmin | dmax | dmin | ISO | old JIS | |
| M1 ×0.25 | 1.000 | 0.933 | 0.985 | 0.940 | 0.95 | 0.95 |
| M1 ×0.2 | 1.000 | 0.944 | 0.980 | 0.930 | 0.96 | 0.94 |
| M1.1×0.25 | 1.100 | 1.033 | 1.100 | 1.033 | 1.05 | 1.05 |
| M1.1×0.2 | 1.100 | 1.044 | 1.100 | 1.044 | 1.06 | 1.06 |
| M1.2×0.25 | 1.200 | 1.133 | 1.185 | 1.140 | 1.15 | 1.15 |
| M1.2×0.2 | 1.200 | 1.144 | 1.180 | 1.130 | 1.16 | 1.14 |
| M1.4×0.3 | 1.400 | 1.325 | 1.380 | 1.320 | 1.34 | 1.34 |
| M1.4×0.2 | 1.400 | 1.344 | 1.380 | 1.330 | 1.36 | 1.34 |
| M1.6×0.35 | 1.581 | 1.496 | 1.581 | 1.496 | 1.52 | 1.52 |
| M1.6×0.2 | 1.583 | 1.527 | 1.583 | 1.527 | 1.54 | 1.54 |
| M1.7×0.35 | 1.681 | 1.596 | 1.680 | 1.610 | 1.62 | 1.63 |
| M1.7×0.2 | 1.683 | 1.627 | 1.680 | 1.630 | 1.64 | 1.64 |
| M1.8×0.35 | 1.781 | 1.696 | 1.781 | 1.696 | 1.72 | 1.72 |
| M1.8×0.2 | 1.783 | 1.727 | 1.783 | 1.727 | 1.74 | 1.74 |
| M2 ×0.4 | 1.981 | 1.886 | 1.980 | 1.890 | 1.91 | 1.91 |
| M2 ×0.25 | 1.982 | 1.915 | 1.980 | 1.930 | 1.93 | 1.94 |
| M2.2×0.45 | 2.180 | 2.080 | 2.180 | 2.080 | 2.11 | 2.11 |
| M2.2×0.25 | 2.182 | 2.115 | 2.182 | 2.115 | 2.13 | 2.13 |
| M2.3×0.4 | 2.281 | 2.186 | 2.280 | 2.190 | 2.21 | 2.21 |
| M2.3×0.25 | 2.282 | 2.215 | 2.280 | 2.230 | 2.23 | 2.24 |
| M2.5×0.45 | 2.480 | 2.380 | 2.480 | 2.380 | 2.41 | 2.41 |
| M2.5×0.35 | 2.481 | 2.396 | 2.481 | 2.396 | 2.42 | 2.42 |
| M2.6×0.45 | 2.580 | 2.480 | 2.580 | 2.480 | 2.51 | 2.51 |
| M2.6×0.35 | 2.581 | 2.496 | 2.580 | 2.480 | 2.52 | 2.51 |
| M3 ×0.5 | 2.980 | 2.874 | 2.980 | 2.874 | 2.90 | 2.90 |
| M3 ×0.35 | 2.981 | 2.896 | 2.980 | 2.880 | 2.92 | 2.91 |
| M3.5×0.6 | 3.479 | 3.354 | 3.470 | 3.360 | 3.39 | 3.39 |
| M3.5×0.35 | 3.481 | 3.396 | 3.480 | 3.380 | 3.42 | 3.41 |
| M4 ×0.7 | 3.978 | 3.838 | 3.978 | 3.838 | 3.87 | 3.87 |
| M4 ×0.5 | 3.980 | 3.874 | 3.970 | 3.860 | 3.90 | 3.89 |
| M4.5×0.75 | 4.478 | 4.338 | 4.470 | 4.340 | 4.37 | 4.37 |
| M4.5×0.5 | 4.480 | 4.374 | 4.470 | 4.360 | 4.40 | 4.39 |
| M5 ×0.8 | 4.976 | 4.826 | 4.976 | 4.826 | 4.86 | 4.86 |
| M5 ×0.5 | 4.980 | 4.874 | 4.970 | 4.860 | 4.90 | 4.89 |
| M5.5×0.5 | 5.480 | 5.374 | 5.470 | 5.360 | 5.40 | 5.39 |
| M6 ×1 | 5.974 | 5.794 | 5.970 | 5.820 | 5.84 | 5.86 |
| M6 ×0.75 | 5.978 | 5.838 | 5.970 | 5.850 | 5.87 | 5.88 |
| M7 ×1 | 6.974 | 6.794 | 6.970 | 6.820 | 6.84 | 6.86 |
| M7 ×0.75 | 6.978 | 6.838 | 6.970 | 6.850 | 6.87 | 6.88 |
| M8 ×1.25 | 7.972 | 7.760 | 7.960 | 7.790 | 7.81 | 7.83 |
| M8 ×1 | 7.974 | 7.794 | 7.970 | 7.830 | 7.84 | 7.87 |
| M8 ×0.75 | 7.978 | 7.838 | 7.970 | 7.830 | 7.87 | 7.87 |
| M9 ×1.25 | 8.972 | 8.760 | 8.960 | 8.790 | 8.81 | 8.83 |
| M9 ×1 | 8.974 | 8.794 | 8.970 | 8.830 | 8.84 | 8.87 |
| S | ize | major d IS | iameter o O | f external old | threads JIS | bar dia (re | meter f.) |
| dmax | dmin | dmax | dmin | ISO | old JIS | ||
| M9 | ×0.75 | 8.978 | 8.838 | 8.970 | 8.830 | 8.87 | 8.87 |
| M10 | ×1.5 | 9.968 | 9.732 | 9.960 | 9.770 | 9.79 | 9.82 |
| M10 | ×1.25 | 9.972 | 9.760 | 9.960 | 9.810 | 9.81 | 9.85 |
| M10 | ×1 | 9.974 | 9.794 | 9.970 | 9.820 | 9.84 | 9.86 |
| M10 | ×0.75 | 9.978 | 9.838 | 9.978 | 9.838 | 9.87 | 9.87 |
| M11 | ×1.5 | 10.968 | 10.732 | 10.968 | 10.732 | 10.79 | 10.79 |
| M11 | ×1 | 10.974 | 10.794 | 10.970 | 10.820 | 10.84 | 10.86 |
| M11 | ×0.75 | 10.978 | 10.838 | 10.978 | 10.838 | 10.87 | 10.87 |
| M12 | ×1.75 | 11.966 | 11.701 | 11.950 | 11.760 | 11.8 | 11.8 |
| M12 | ×1.5 | 11.968 | 11.732 | 11.960 | 11.790 | 11.8 | 11.8 |
| M12 | ×1.25 | 11.972 | 11.760 | 11.972 | 11.760 | 11.8 | 11.8 |
| M12 | ×1 | 11.974 | 11.794 | 11.960 | 11.810 | 11.84 | 11.85 |
| M14 | ×2 | 13.962 | 13.682 | 13.950 | 13.740 | 13.8 | 13.8 |
| M14 | ×1.5 | 13.968 | 13.732 | 13.960 | 13.790 | 13.8 | 13.8 |
| M14 | ×1 | 13.974 | 13.794 | 13.960 | 13.810 | 13.84 | 13.85 |
| M15 | ×1.5 | 14.968 | 14.732 | 14.960 | 14.790 | 14.8 | 14.8 |
| M15 | ×1 | 14.974 | 14.794 | 14.960 | 14.810 | 14.84 | 14.85 |
| M16 | ×2 | 15.962 | 15.682 | 15.950 | 15.740 | 15.8 | 15.8 |
| M16 | ×1.5 | 15.968 | 15.732 | 15.960 | 15.790 | 15.8 | 15.8 |
| M16 | ×1 | 15.974 | 15.794 | 15.960 | 15.810 | 15.84 | 15.85 |
| M17 | ×1.5 | 16.968 | 16.732 | 16.968 | 16.732 | 16.8 | 16.8 |
| M17 | ×1 | 16.974 | 16.794 | 16.974 | 16.794 | 16.84 | 16.84 |
| M18 | ×2.5 | 17.958 | 17.623 | 17.950 | 17.710 | 17.7 | 17.8 |
| M18 | ×2 | 17.962 | 17.682 | 17.950 | 17.650 | 17.8 | 17.7 |
| M18 | ×1.5 | 17.968 | 17.732 | 17.950 | 17.780 | 17.8 | 17.8 |
| M18 | ×1 | 17.974 | 17.794 | 17.960 | 17.810 | 17.84 | 17.85 |
| M20 | ×2.5 | 19.958 | 19.623 | 19.950 | 19.710 | 19.7 | 19.8 |
| M20 | ×2 | 19.962 | 19.682 | 19.950 | 19.650 | 19.8 | 19.7 |
| M20 | ×1.5 | 19.968 | 19.732 | 19.950 | 19.780 | 19.8 | 19.8 |
| M20 | ×1 | 19.974 | 19.794 | 19.960 | 19.810 | 19.84 | 19.85 |
| M22 | ×2.5 | 21.958 | 21.623 | 21.950 | 21.710 | 21.7 | 21.8 |
| M22 | ×2 | 21.962 | 21.682 | 21.950 | 21.650 | 21.8 | 21.7 |
| M22 | ×1.5 | 21.968 | 21.732 | 21.950 | 21.780 | 21.8 | 21.8 |
| M22 | ×1 | 21.974 | 21.794 | 21.960 | 21.810 | 21.84 | 21.85 |
| M24 | ×3 | 23.952 | 23.577 | 23.940 | 23.680 | 23.7 | 23.7 |
| M24 | ×2 | 23.962 | 23.682 | 23.940 | 23.640 | 23.8 | 23.7 |
| M24 | ×1.5 | 23.968 | 23.732 | 23.950 | 23.780 | 23.8 | 23.8 |
| M24 | ×1 | 23.974 | 23.794 | 23.960 | 23.810 | 23.84 | 23.85 |
| M25 | ×2 | 24.962 | 24.682 | 24.940 | 24.640 | 24.8 | 24.7 |
| M25 | ×1.5 | 24.968 | 24.732 | 24.950 | 24.780 | 24.8 | 24.8 |
| M25 | ×1 | 24.974 | 24.794 | 24.960 | 24.810 | 24.84 | 24.85 |
| M26 | ×1.5 | 25.968 | 25.732 | 25.950 | 25.780 | 25.8 | 25.8 |
| M27 | ×3 | 26.952 | 26.577 | 26.940 | 26.680 | 26.7 | 26.7 |
| 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 |
| M27 | ×1 | 26.974 | 26.794 | 26.974 | 26.794 | 26.84 | 26.84 |
| M28 | ×2 | 27.962 | 27.682 | 27.940 | 27.640 | 27.8 | 27.7 |
| M28 | ×1.5 | 27.968 | 27.732 | 27.950 | 27.780 | 27.8 | 27.8 |
| M28 | ×1 | 27.974 | 27.794 | 27.960 | 27.810 | 27.84 | 27.85 |
| M30 | ×35 | 29947 | 29522 | 29940 | 29660 | 296 | 297 |
| M30 | . ×3 | . 29.952 | . 29.577 | . 29.952 | . 29.577 | . 29.7 | . 29.7 |
ISO tolerance area Class 6g (M1.6 and larger) 6h (M1.4 and smaller) old JIS 2nd class ・ISO : from table 2 JIS B0209-2 and from table 1 JIS B0209-3
tolerable limit size and the tolerance of metric fine threads (for 2nd class external