17. Bar diameter for external threads ( for cutting type dies ) Production data ■ ■ Metric threads unit: mm P mdajmoradx iamdetemrinof exteTrndal thredamdsax dbamr idniameteTrd P mdajmoar xdiamdetmerinof exteTrnd al thrdeamdasx dbamrindiametTerd Size ISO old JIS (ref.) Size ISO old JIS (ref.) 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 8.838 8.970 8.830 8.87 8.87 M1 ×0.2 1.000 0.944 0.980 0.930 0.96 0.94 M10 ×1.5 9.968 9.732 9.960 9.770 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 9.760 9.960 9.810 9.81 9.85 M1.1 ×0.2 1.100 1.044 1.100 1.044 1.06 1.06 M10 ×1 9.974 9.794 9.970 9.820 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 ISO tolerance area Class 6g (M1.6 and larger) 6h (M1.4 and smaller) old JIS 2nd class M27 ×1.5 26.968 26.732 26.950 26.780 26.8 26.8 Information old JIS 2nd class M27 ×1 26.974 26.794 26.974 26.794 26.84 26.84 Technical ・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 Technical-47 818