
Metric Threads (M. MF) Unit: mm
| SP | Size | Major d IS | iameter o O | f external old | threads JIS | Bar Di | ameter | ||
| Max. | Min. | Max. | Min. | ISO | old JIS | ||||
| M1 | × | 0.25 | 1.000 | 0.933 | 0.985 | 0.940 | 0.95 | 0.95 | |
| SL | MF1 | × | 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 | |
| MF1.1 | × | 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 | |
| PO | MF1.2 | × | 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 | |
| MF1.4 | × | 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 | |
| MF1.6 | × | 0.2 | 1.583 | 1.527 | 1.583 | 1.527 | 1.54 | 1.54 | |
| ST | M1.7 | × | 0.35 | 1.681 | 1.596 | 1.680 | 1.610 | 1.62 | 1.63 |
| MF1.7 | × | 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 | |
| MF1.8 | × | 0.2 | 1.783 | 1.727 | 1.783 | 1.727 | 1.74 | 1.74 | |
| ROLL | M2 | × | 0.4 | 1.981 | 1.886 | 1.980 | 1.890 | 1.91 | 1.91 |
| MF2 | × | 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 | |
| MF2.2 | × | 0.25 | 2.182 | 2.115 | 2.182 | 2.115 | 2.13 | 2.13 | |
| CARBIDE | M2.3 | × | 0.4 | 2.281 | 2.186 | 2.280 | 2.190 | 2.21 | 2.21 |
| MF2.3 | × | 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 | |
| MF2.5 | × | 0.35 | 2.481 | 2.396 | 2.481 | 2.396 | 2.42 | 2.42 | |
| LONG | M2.6 | × | 0.45 | 2.580 | 2.480 | 2.580 | 2.480 | 2.51 | 2.51 |
| MF2.6 | × | 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 | |
| MF3 | × | 0.35 | 2.981 | 2.896 | 2.980 | 2.880 | 2.92 | 2.91 | |
| HAND | M3.5 | × | 0.6 | 3.479 | 3.354 | 3.470 | 3.360 | 3.39 | 3.39 |
| TAPS | MF3.5 | × | 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 | |
| MF4 | × | 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 | |
| EG (STI) | MF4.5 | × | 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 | |
| MF5 | × | 0.5 | 4.980 | 4.874 | 4.970 | 4.860 | 4.90 | 4.89 | |
| SPECIAL | MF5.5 | × | 0.5 | 5.480 | 5.374 | 5.470 | 5.360 | 5.40 | 5.39 |
| THREADS, | M6 | × | 1 | 5.974 | 5.794 | 5.970 | 5.820 | 5.84 | 5.86 |
| GAUGES | MF6 | × | 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 | |
| MF7 | × | 0.75 | 6.978 | 6.838 | 6.970 | 6.850 | 6.87 | 6.88 | |
| THREAD | M8 | × | 1.25 | 7.972 | 7.760 | 7.960 | 7.790 | 7.81 | 7.83 |
| MILLS | MF8 | × | 1 | 7.974 | 7.794 | 7.970 | 7.830 | 7.84 | 7.87 |
| MF8 | × | 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 | |
| DIES | MF9 | × | 1 | 8.974 | 8.794 | 8.970 | 8.830 | 8.84 | 8.87 |
| MF9 | × | 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 | |
| MF10 | × | 1.25 | 9.972 | 9.760 | 9.960 | 9.810 | 9.81 | 9.85 | |
| CENTER | MF10 | × | 1 | 9.974 | 9.794 | 9.970 | 9.820 | 9.84 | 9.86 |
| DRILLS | MF10 | × | 075 | 9978 | 9838 | 9978 | 9838 | 987 | 987 |
| M11 | × | . 1.5 | . 10.968 | . 10.732 | . 10.968 | . 10.732 | . 10.79 | . 10.79 |
| Size | Major di IS | ameter of O | external old | threads JIS | Bar Dia | meter | ||
| Max. | Min. | Max. | Min. | ISO | old JIS | |||
| MF11 | × | 1 | 10.974 | 10.794 | 10.970 | 10.820 | 10.84 | 10.86 |
| MF11 | × | 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 |
| MF12 | × | 1.5 | 11.968 | 11.732 | 11.960 | 11.790 | 11.8 | 11.8 |
| MF12 | × | 1.25 | 11.972 | 11.760 | 11.972 | 11.760 | 11.8 | 11.8 |
| MF12 | × | 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 |
| MF14 | × | 1.5 | 13.968 | 13.732 | 13.960 | 13.790 | 13.8 | 13.8 |
| MF14 | × | 1 | 13.974 | 13.794 | 13.960 | 13.810 | 13.84 | 13.85 |
| MF15 | × | 1.5 | 14.968 | 14.732 | 14.960 | 14.790 | 14.8 | 14.8 |
| MF15 | × | 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 |
| MF16 | × | 1.5 | 15.968 | 15.732 | 15.960 | 15.790 | 15.8 | 15.8 |
| MF16 | × | 1 | 15.974 | 15.794 | 15.960 | 15.810 | 15.84 | 15.85 |
| MF17 | × | 1.5 | 16.968 | 16.732 | 16.968 | 16.732 | 16.8 | 16.8 |
| MF17 | × | 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 |
| MF18 | × | 2 | 17.962 | 17.682 | 17.950 | 17.650 | 17.8 | 17.7 |
| MF18 | × | 1.5 | 17.968 | 17.732 | 17.950 | 17.780 | 17.8 | 17.8 |
| MF18 | × | 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 |
| MF20 | × | 2 | 19.962 | 19.682 | 19.950 | 19.650 | 19.8 | 19.7 |
| MF20 | × | 1.5 | 19.968 | 19.732 | 19.950 | 19.780 | 19.8 | 19.8 |
| MF20 | × | 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 |
| MF22 | × | 2 | 21.962 | 21.682 | 21.950 | 21.650 | 21.8 | 21.7 |
| MF22 | × | 1.5 | 21.968 | 21.732 | 21.950 | 21.780 | 21.8 | 21.8 |
| MF22 | × | 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 |
| MF24 | × | 2 | 23.962 | 23.682 | 23.940 | 23.640 | 23.8 | 23.7 |
| MF24 | × | 1.5 | 23.968 | 23.732 | 23.950 | 23.780 | 23.8 | 23.8 |
| MF24 | × | 1 | 23.974 | 23.794 | 23.960 | 23.810 | 23.84 | 23.85 |
| MF25 | × | 2 | 24.962 | 24.682 | 24.940 | 24.640 | 24.8 | 24.7 |
| MF25 | × | 1.5 | 24.968 | 24.732 | 24.950 | 24.780 | 24.8 | 24.8 |
| MF25 | × | 1 | 24.974 | 24.794 | 24.960 | 24.810 | 24.84 | 24.85 |
| MF26 | × | 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 |
| MF27 | × | 2 | 26.962 | 26.682 | 26.962 | 26.682 | 26.8 | 26.8 |
| MF27 | × | 1.5 | 26.968 | 26.732 | 26.950 | 26.780 | 26.8 | 26.8 |
| MF27 | × | 1 | 26.974 | 26.794 | 26.974 | 26.794 | 26.84 | 26.84 |
| MF28 | × | 2 | 27.962 | 27.682 | 27.940 | 27.640 | 27.8 | 27.7 |
| MF28 | × | 1.5 | 27.968 | 27.732 | 27.950 | 27.780 | 27.8 | 27.8 |
| MF28 | × | 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 |
| MF30 | × | 3 | 29.952 | 29.577 | 29.952 | 29.577 | 29.7 | 29.7 |
| MF30 | × | 2 | 29.962 | 29.682 | 29.940 | 29.640 | 29.8 | 29.7 |
| MF30 | × | 1.5 | 29.968 | 29.732 | 29.950 | 29.780 | 29.8 | 29.8 |
| MF30 | × | 1 | 29.974 | 29.794 | 29.960 | 29.810 | 29.84 | 29.85 |
| MF32 MF32 | × × | 2 1.5 | 31.962 31.968 | 31.682 31.732 | 31.940 31.950 | 31.640 31.780 | 31.8 31.8 | 31.7 31.8 |