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ASME B1.13M Metric Coarse Threads

American National Standard ANSI/ASME B1.13M-1983 (R1995) describes a system of metric threads for general fastening purposes in mechanisms and structures. The standard is in basic agreement with ISO screw standards and resolutions, as of the date of publication, and features detailed information for diameter-pitch combinations selected as to preferred standard sizes. This Standard contains general metric standards for a 60-degree symmetrical screw thread with a basic ISO 68 designated profile.

External Thread
M1.6 - M5 M6 - M10 M10 - M12 M14 - M18 M20 - M24 M25 - M33 M35 - M42 M45 - M56 M60 - M72 M75 - M90 M95 - M120 M130 - M200
Internal Thread
M1.6 - M15 M16 - M36 M39 - M80 M85 - M200

External Thread - Limiting Dimensions M Profile (Cont’d)

Metric Coarse Thread

Basic
Thread
Designation		 Tolerance
class		 Allowance,
es		 Major Dia, d Pitch Dia, d2 and Functional Dia d1

d3

Max. Min. Max. Min. Tol.
M1.6 x 0.35 6g 0.019 1.581 1.496 1.354 1.291 0.063 1.202 1.075
M1.6 x 0.35 6h 0.000 1.600 1.515 1.373 1.310 0.063 1.221 1.094
M1.6 x 0.35 4g6g 0.019 1.581 1.496 1.354 1.314 0.040 1.202 1.098
M2 x 0.4 6g 0.019 1.981 1.886 1.721 1.654 0.067 1.548 1.408
M2 x 0.4 6h 0.000 2.000 1.905 1.740 1.673 0.067 1.567 1.427
M2 x 0.4 4g6g 0.019 1.981 1.886 1.721 1.679 0.042 1.548 1.433
M2.5 x 0.45 6g 0.020 2.480 2.380 2.188 2.117 0.071 1.993 1.840
M2.5 x 0.45 6h 0.000 2.500 2.400 2.208 2.137 0.071 2.013 1.860
M2.5 x 0.45 4g6g 0.020 2.480 2.380 2.188 2.143 0.045 1.993 1.866
M3 x 0.5 6g 0.020 2.980 2.874 2.655 2.580 0.075 2.438 2.272
M3 x 0.5 6h 0.000 3.000 2.894 2.675 2.600 0.075 2.458 2.292
M3 x 0.5 4g6g 0.020 2.980 2.874 2.655 2.607 0.048 2.438 2.299
M3.5 x 0.6 6g 0.021 3.479 3.354 3.089 3.004 0.085 2.829 2.634
M3.5 x 0.6 6h 0.000 3.500 3.375 3.110 3.025 0.085 2.850 2.655
M3.5 x 0.6 4g6g 0.021 3.479 3.354 3.089 3.036 0.053 2.829 2.666
M4 x 0.7 6g 0.022 3.978 3.838 3.523 3.433 0.090 3.220 3.002
M4 x 0.7 6h 0.000 4.000 3.860 3.545 3.455 0.090 3.242 3.024
M4 x 0.7 4g6g 0.022 3.978 3.838 3.523 3.467 0.056 3.220 3.036
M5 x 0.8 6g 0.024 4.976 4.826 4.456 4.361 0.095 4.110 3.868
M5 x 0.8 6h 0.000 5.000 4.850 4.480 4.385 0.095 4.134 3.892
M5 x 0.8 4g6g 0.024 4.976 4.826 4.456 4.396 0.060 4.110 3.903
M6 x 1 6g 0.026 5.974 5.794 5.324 5.212 0.112 4.891 4.596
M6 x 1 6h 0.000 6.000 5.820 5.350 5.238 0.112 4.917 4.622
M6 x 1 4g6g 0.026 5.974 5.794 5.324 5.253 0.071 4.891 4.637
M8 x 1.25 6g 0.028 7.972 7.760 7.160 7.042 0.118 6.619 6.272
M8 x 1.25 6h 0.000 8.000 7.788 7.188 7.070 0.118 6.647 6.300
M8 x 1.25 4g6g 0.028 7.972 7.760 7.160 7.085 0.075 6.619 6.315
M8 x 1 6g 0.026 7.974 7.794 7.324 7.212 0.112 6.891 6.596
M8 x 1 6h 0.000 8.000 7.820 7.350 7.238 0.112 6.917 6.622
M8 x 1 4g6g 0.026 7.974 7.794 7.324 7.253 0.071 6.891 6.637
M10 x 1.5 6g 0.032 9.968 9.732 8.994 8.862 0.132 8.344 7.938
M10 x 1.5 6h 0.000 10.000 9.764 9.026 8.894 0.132 8.376 7.970
M10 x 1.5 4g6g 0.032 9.968 9.732 8.994 8.909 0.085 8.344 7.985
M10 x 1.25 6g 0.028 9.972 9.760 9.160 9.042 0.118 8.619 8.272
M10 x 1.25 6h 0.000 10.000 9.788 9.188 9.070 0.118 8.647 8.300
M10 x 1.25 4g6g 0.028 9.972 9.760 9.160 9.085 0.075 8.619 8.315
M10 x 1 6g 0.026 9.974 9.794 9.324 9.212 0.112 8.891 8.596
M10 x 1 6h 0.000 10.000 9.820 9.350 9.238 0.112 8.917 8.622
M10 x 1 4g6g 0.026 9.974 9.794 9.324 9.253 0.071 8.891 8.637
M10 x 0.75 6g 0.022 9.978 9.838 9.491 9.391 0.100 9.166 8.929
M10 x 0.75 6h 0.000 10.000 9.860 9.513 9.413 0.100 9.188 8.951
M10 x 0.75 4g6g 0.022 9.978 9.838 9.491 9.428 0.063 9.166 8.966
M12 x 1.75 6g 0.034 11.966 11.701 10.829 10.679 0.150 10.071 9.601
M12 x 1.75 6h 0.000 12.000 11.735 10.863 10.713 0.150 10.105 9.635
M12 x 1.75 4g6g 0.034 11.966 11.701 10.829 10.734 0.095 10.071 9.656
M12 x 1.5 6g 0.032 11.968 11.732 10.994 10.854 0.140 10.344 9.930
M12 x 1.5 6h 0.000 12.000 11.764 11.026 10.886 0.140 10.376 9.962
M12 x 1.5 4g6g 0.032 11.968 11.732 10.994 10.904 0.090 10.344 9.980
M12 x 1.25 6g 0.028 11.972 11.760 11.160 11.028 0.132 10.619 10.258
M12 x 1.25 6h 0.000 12.000 11.788 11.188 11.056 0.132 10.647 10.286
M12 x 1.25 4g6g 0.028 11.972 11.760 11.160 11.075 0.085 10.619 10.305
M12 x 1 6g 0.026 11.974 11.794 11.324 11.206 0.118 10.891 10.590
M12 x 1 6h 0.000 12.000 11.820 11.350 11.232 0.118 10.917 10.616
M12 x 1 4g6g 0.026 11.974 11.794 11.324 11.249 0.075 10.891 10.633
M14 x 2 6g 0.038 13.962 13.682 12.663 12.503 0.160 11.797 11.271
M14 x 2 6h 0.000 14.000 13.720 12.701 12.541 0.160 11.835 11.309
M14 x 2 4g6g 0.038 13.962 13.682 12.663 12.563 0.100 11.797 11.331
M14 x 1.5 6g 0.032 13.968 13.732 12.994 12.854 0.140 12.344 11.930
M14 x 1.5 6h 0.000 14.000 13.764 13.026 12.886 0.140 12.376 11.962
M14 x 1.5 4g6g 0.032 13.968 13.732 12.994 12.904 0.090 12.344 11.980
M15 x 1 6g 0.026 14.974 14.794 14.324 14.206 0.118 13.891 13.590
M15 x 1 6h 0.000 15.000 14.820 14.350 14.232 0.118 13.917 13.616
M15 x 1 4g6g 0.026 14.974 14.794 14.324 14.249 0.075 13.891 13.633
M16 x 2 6g 0.038 15.962 15.682 14.663 14.503 0.160 13.797 13.271
M16 x 2 6h 0.000 16.000 15.720 14.701 14.541 0.160 13.835 13.309
M16 x 1.5 4g6g 0.038 15.962 15.682 14.663 14.563 0.100 13.797 13.331
M16 x 1.5 6g 0.032 15.968 15.732 14.994 14.854 0.140 14.344 13.930
M16 x 1.5 6h 0.000 16.000 15.764 15.026 14.886 0.140 14.376 13.962
M17 x 1 4g6g 0.032 15.968 15.732 14.994 14.904 0.090 14.344 13.980
M17 x 1 6g 0.026 16.974 16.794 16.324 16.206 0.118 15.891 15.590
M17 x 1 6h 0.000 17.000 16.820 16.350 16.232 0.118 15.917 15.616
M18 x 1.5 4g6g 0.026 16.974 16.794 16.324 16.249 0.075 15.891 15.633
M18 x 1.5 6g 0.032 17.968 17.732 16.994 16.854 0.140 16.344 15.930
M18 x 1.5 6h 0.000 18.000 17.764 17.026 16.886 0.140 16.376 15.962
M20 x 2.5 4g6g 0.032 17.968 17.732 16.994 16.904 0.090 16.344 15.980
M20 x 2.5 6g 0.042 19.958 19.623 18.334 18.164 0.170 17.251 16.624
M20 x 2.5 6h 0.000 20.000 19.665 18.376 18.206 0.170 17.293 16.666
M20 x 1.5 4g6g 0.042 19.958 19.623 18.334 18.228 0.106 17.251 16.688
M20 x 1.5 6g 0.032 19.968 19.732 18.994 18.854 0.140 18.344 17.930
M20 x 1.5 6h 0.000 20.000 19.764 19.026 18.886 0.140 18.376 17.962
M20 x 1 4g6g 0.032 19.968 19.732 18.994 18.904 0.090 18.344 17.980
M20 x 1 6g 0.026 19.974 19.794 19.324 19.206 0.118 18.891 18.590
M20 x 1 6h 0.000 20.000 19.820 19.350 19.232 0.118 18.917 18.616
M22 x 2.5 4g6g 0.026 19.974 19.794 19.324 19.249 0.075 18.891 18.633
M22 x 2.5 6g 0.042 21.958 21.623 20.334 20.164 0.170 19.251 18.624
M22 x 1.5 6h 0.000 22.000 21.665 20.376 20.206 0.170 19.293 18.666
M22 x 1.5 6g 0.032 21.968 21.732 20.994 20.854 0.140 20.344 19.930
M22 x 1.5 6h 0.000 22.000 21.764 21.026 20.886 0.140 20.376 19.962
M24 x 3 4g6g 0.032 21.968 21.732 20.994 20.904 0.090 20.344 19.980
M24 x 3 6g 0.048 23.952 23.577 22.003 21.803 0.200 20.704 19.955
M24 x 3 6h 0.000 24.000 23.625 22.051 21.851 0.200 20.752 20.003
M24 x 2 4g6g 0.048 23.952 23.577 22.003 21.878 0.125 20.704 20.030
M24 x 2 6g 0.038 23.962 23.682 22.663 22.493 0.170 21.797 21.261
M24 x 2 6h 0.000 24.000 23.720 22.701 22.531 0.170 21.835 21.299
M24 x 2 4g6g 0.038 23.962 23.682 22.663 22.557 0.106 21.797 21.325
M25 x 1.5 6g 0.032 24.968 24.732 23.994 23.844 0.150 23.344 22.920
M25 x 1.5 6h 0.000 25.000 24.764 24.026 23.876 0.150 23.376 22.952
M25 x 1.5 4g6g 0.032 24.968 24.732 23.994 23.899 0.095 23.344 22.975
M27 x 3 6g 0.048 26.952 26.577 25.003 24.803 0.200 23.704 22.955
M27 x 3 6h 0.000 27.000 26.625 25.051 24.851 0.200 23.752 23.003
M27 x 2 6g 0.038 26.962 26.682 25.663 25.493 0.170 24.797 24.261
M27 x 2 6h 0.000 27.000 26.720 25.701 25.531 0.170 24.835 24.299
M27 x 2 4g6g 0.038 26.962 26.682 25.663 25.557 0.106 24.797 24.325
M30 x 3.5 6g 0.053 29.947 29.522 27.674 27.462 0.212 26.158 25.306
M30 x 3.5 6h 0.000 30.000 29.575 27.727 27.515 0.212 26.211 25.359
M30 x 3.5 4g6g 0.053 29.947 29.522 27.674 27.542 0.132 26.158 25.386
M30 x 2 6g 0.038 29.962 29.682 28.663 28.493 0.170 27.797 27.261
M30 x 2 6h 0.000 30.000 29.720 28.701 28.531 0.170 27.835 27.299
M30 x 2 4g6g 0.038 29.962 29.682 28.663 28.557 0.106 27.797 27.325
M30 x 1.5 6g 0.032 29.968 29.732 28.994 28.844 0.150 28.344 27.920
M30 x 1.5 6h 0.000 30.000 29.764 29.026 28.876 0.150 28.376 27.952
M30 x 1.5 4g6g 0.032 29.968 29.732 28.994 28.899 0.095 28.344 27.975
M33 x 2 6g 0.038 32.962 32.682 31.663 31.493 0.170 30.797 30.261
M33 x 2 6h 0.000 33.000 32.720 31.701 31.531 0.170 30.835 30.299
M33 x 2 4g6g 0.038 32.962 32.682 31.663 31.557 0.106 30.797 30.325
M35 x 1.5 6g 0.032 34.968 34.732 33.994 33.844 0.150 33.344 32.920
M35 x 1.5 6h 0.000 35.000 34.764 34.026 33.876 0.150 33.376 32.952
M36 x 4 6g 0.060 35.940 35.465 33.342 33.118 0.224 31.610 30.654
M36 x 4 6h 0.000 36.000 35.525 33.402 33.178 0.224 31.670 30.714
M36 x 4 4g6g 0.060 35.940 35.465 33.342 33.202 0.140 31.610 30.738
M36 x 2 6g 0.038 35.962 35.682 34.663 34.493 0.170 33.797 33.261
M36 x 2 6h 0.000 36.000 35.720 34.701 34.531 0.170 33.835 33.299
M36 x 2 4g6g 0.038 35.962 35.682 34.663 34.557 0.106 33.797 33.325
M39 x 2 6g 0.038 38.962 38.682 37.663 37.493 0.170 36.797 36.261
M39 x 2 6h 0.000 39.000 38.720 37.701 37.531 0.170 36.835 36.299
M39 x 2 4g6g 0.038 38.962 38.682 37.663 37.557 0.106 36.797 36.325
M40 x 1.5 6g 0.032 39.968 39.732 38.994 38.844 0.150 38.344 37.920
M40 x 1.5 6h 0.000 40.000 39.764 39.026 38.876 0.150 38.376 37.952
M40 x 1.5 4g6g 0.032 39.968 39.732 38.994 38.899 0.095 38.344 37.975
M42 x 4.5 6g 0.063 41.937 41.437 39.014 38.778 0.236 37.065 36.006
M42 x 4.5 6h 0.000 42.000 41.500 39.077 38.841 0.236 37.128 36.069
M42 x 4.5 4g6g 0.063 41.937 41.437 39.014 38.864 0.150 37.065 36.092
M42 x 2 6g 0.038 41.962 41.682 40.663 40.493 0.170 39.797 39.261
M42 x 2 6h 0.000 42.000 41.720 40.701 40.531 0.170 39.835 39.299
M42 x 2 4g6g 0.038 41.962 41.682 40.663 40.557 0.106 39.797 39.325
M45 x 1.5 6g 0.032 44.968 44.732 43.994 43.844 0.150 43.344 42.920
M45 x 1.5 6h 0.000 45.000 44.764 44.026 43.876 0.150 43.376 42.952
M45 x 1.5 4g6g 0.032 44.968 44.732 43.994 43.899 0.095 43.344 42.975
M48 x 5 6g 0.071 47.929 47.399 44.681 44.431 0.250 42.516 41.351
M48 x 5 6h 0.000 48.000 47.470 44.752 44.502 0.250 42.587 41.422
M48 x 5 4g6g 0.071 47.929 47.399 44.681 44.521 0.160 42.516 41.441
M48 x 2 6g 0.038 47.962 47.682 46.663 46.483 0.180 45.797 45.251
M48 x 2 6h 0.000 48.000 47.720 46.701 46.521 0.180 45.835 45.289
M48 x 2 4g6g 0.038 47.962 47.682 46.663 46.551 0.112 45.797 45.319
M50 x 1.5 6g 0.032 49.968 49.732 48.994 48.834 0.160 48.344 47.910
M50 x 1.5 6h 0.000 50.000 49.764 49.026 48.866 0.160 48.376 47.942
M50 x 1.5 4g6g 0.032 49.968 49.732 48.994 48.894 0.100 48.344 47.970
M55 x 1.5 6g 0.032 54.968 54.732 53.994 53.834 0.160 53.344 52.910
M55 x 1.5 6h 0.000 55.000 54.764 54.026 53.866 0.160 53.376 52.942
M55 x 1.5 4g6g 0.032 54.968 54.732 53.994 53.894 0.100 53.344 52.970
M56 x 5.5 6g 0.075 55.925 55.365 52.353 52.088 0.265 49.971 48.700
M56 x 5.5 6h 0.000 56.000 55.440 52.428 52.163 0.265 50.046 48.775
M56 x 5.5 4g6g 0.075 55.925 55.365 52.353 52.183 0.170 49.971 48.795
M56 x 2 6g 0.038 55.962 55.682 54.663 54.483 0.180 53.797 53.251
M56 x 2 6h 0.000 56.000 55.720 54.701 54.521 0.180 53.835 53.289
M56 x 2 4g6g 0.038 55.962 55.682 54.663 54.551 0.112 53.797 53.319
M60 x 1.5 6g 0.032 59.968 59.732 58.994 58.834 0.160 58.344 57.910
M60 x 1.5 6h 0.000 60.000 59.764 59.026 58.866 0.160 58.376 57.942
M60 x 1.5 4g6g 0.032 59.968 59.732 58.994 58.894 0.100 58.344 57.970
M64 x 6 6g 0.080 63.920 63.320 60.023 59.743 0.280 57.425 56.047
M64 x 6 6h 0.000 64.000 63.400 60.103 59.823 0.280 57.505 56.127
M64 x 6 4g6g 0.080 63.920 63.320 60.023 59.843 0.180 57.425 56.147
M64 x 2 6g 0.038 63.962 63.682 62.663 62.483 0.180 61.797 61.251
M64 x 2 6h 0.000 64.000 63.720 62.701 62.521 0.180 61.835 61.289
M64 x 2 4g6g 0.038 63.962 63.682 62.663 62.551 0.112 61.797 61.319
M65 x 1.5 6g 0.032 64.968 64.732 63.994 63.834 0.160 63.344 62.910
M65 x 1.5 6h 0.000 65.000 64.764 64.026 63.866 0.160 63.376 62.942
M65 x 1.5 4g6g 0.032 64.968 64.732 63.994 63.894 0.100 63.344 62.970
M70 x 1.5 6g 0.032 69.968 69.732 68.994 68.834 0.160 68.344 67.910
M70 x 1.5 6h 0.000 70.000 69.764 69.026 68.866 0.160 68.376 67.942
M70 x 1.5 4g6g 0.032 69.968 69.732 68.994 68.894 0.100 68.344 67.970
M72 x 6 6g 0.080 71.920 71.320 68.023 67.743 0.280 65.425 64.047
M72 x 6 6h 0.000 72.000 71.400 68.103 67.823 0.280 65.505 64.127
M72 x 6 4g6g 0.080 71.920 71.320 68.023 67.843 0.180 65.425 64.147
M72 x 2 6g 0.038 71.962 71.682 70.663 70.483 0.180 69.797 69.251
M72 x 2 6h 0.000 72.000 71.720 70.701 70.521 0.180 69.835 69.289
M72 x 2 4g6g 0.038 71.962 71.682 70.663 70.551 0.112 69.797 69.319
M75 x 1.5 6g 0.032 74.968 74.732 73.994 73.834 0.160 73.344 72.910
M75 x 1.5 6h 0.000 75.000 74.764 74.026 73.866 0.160 73.376 72.942
M75 x 1.5 4g6g 0.032 74.968 74.732 73.994 73.894 0.100 73.344 72.970
M80 x 6 6g 0.080 79.920 79.320 76.023 75.743 0.280 73.425 72.047
M80 x 6 6h 0.000 80.000 79.400 76.103 75.823 0.280 73.505 72.127
M80 x 6 4g6g 0.080 79.920 79.320 76.023 75.843 0.180 73.425 72.147
M80 x 2 6g 0.038 79.962 79.682 78.663 78.483 0.180 77.797 77.251
M80 x 2 6h 0.000 80.000 79.720 78.701 78.521 0.180 77.835 77.289
M80 x 2 4g6g 0.038 79.962 79.682 78.663 78.551 0.112 77.797 77.319
M80 x 1.5 6g 0.032 79.968 79.732 78.994 78.834 0.160 78.344 77.910
M80 x 1.5 6h 0.000 80.000 79.764 79.026 78.866 0.160 78.376 77.942
M80 x 1.5 4g6g 0.032 79.968 79.732 78.994 78.894 0.100 78.344 77.970
M85 x 2 6g 0.038 84.962 84.682 83.663 83.483 0.180 82.797 82.251
M85 x 2 6h 0.000 85.000 84.720 83.701 83.521 0.180 82.835 82.289
M85 x 2 4g6g 0.038 84.962 84.682 83.663 83.551 0.112 82.797 82.319
M90 x 6 6g 0.080 89.920 89.320 86.023 85.743 0.280 83.425 82.047
M90 x 6 6h 0.000 90.000 89.400 86.103 85.823 0.280 83.505 82.127
M90 x 6 4g6g 0.080 89.920 89.320 86.023 85.843 0.180 83.425 82.147
M90 x 2 6g 0.038 89.962 89.682 88.663 88.483 0.180 87.797 87.251
M90 x 2 6h 0.000 90.000 89.720 88.701 88.521 0.180 87.835 87.289
M90 x 2 4g6g 0.038 89.962 89.682 88.663 88.551 0.112 87.797 87.319
M95 x 2 6g 0.038 94.962 94.682 93.663 93.473 0.190 92.797 92.241
M95 x 2 6h 0.000 95.000 94.720 93.701 93.511 0.190 92.835 92.279
M95 x 2 4g6g 0.038 94.962 94.682 93.663 93.545 0.118 92.797 92.313
M100 x 6 6g 0.080 99.920 99.320 96.023 95.723 0.300 93.425 92.027
M100 x 6 6h 0.000 100.000 99.400 96.103 95.803 0.300 93.505 92.107
M100 x 6 4g6g 0.080 99.920 99.320 96.023 95.833 0.190 93.425 92.137
M100 x 2 6g 0.038 99.962 99.682 98.663 98.473 0.190 97.797 97.241
M100 x 2 6h 0.000 100.000 99.720 98.701 98.511 0.190 97.835 97.279
M100 x 2 4g6g 0.038 99.962 99.682 98.663 98.545 0.118 97.797 97.313
M105 x 2 6g 0.038 104.962 104.682 103.663 103.473 0.190 102.797 102.241
M105 x 2 6h 0.000 105.000 104.720 103.701 103.511 0.190 102.835 102.279
M105 x 2 4g6g 0.038 104.962 104.682 103.663 103.545 0.118 102.797 102.313
M110 x 2 6g 0.038 109.962 109.682 108.663 108.473 0.190 107.797 107.241
M110 x 2 6h 0.000 110.000 109.720 108.701 108.511 0.190 107.835 107.279
M110 x 2 4g6g 0.038 109.962 109.682 108.663 108.545 0.118 107.797 107.313
M120 x 2 6g 0.038 119.962 119.682 118.663 118.473 0.190 117.797 117.241
M120 x 2 6h 0.000 120.000 119.720 118.701 118.511 0.190 117.835 117.279
M120 x 2 4g6g 0.038 119.962 119.682 118.663 118.545 0.118 117.797 117.313
M130 x 2 6g 0.038 129.962 129.682 128.663 128.473 0.190 127.797 127.241
M130 x 2 6h 0.000 130.000 129.720 128.701 128.511 0.190 127.835 127.279
M130 x 2 4g6g 0.038 129.962 129.682 128.663 128.545 0.118 127.797 127.313
M140 x 2 6g 0.038 139.962 139.682 138.663 138.473 0.190 137.797 137.241
M140 x 2 6h 0.000 140.000 139.720 138.701 138.511 0.190 137.835 137.279
M140 x 2 4g6g 0.038 139.962 139.682 138.663 138.545 0.118 137.797 137.313
M150 x 2 6g 0.038 149.962 149.682 148.663 148.473 0.190 147.797 147.241
M150 x 2 6h 0.000 150.000 149.720 148.701 148.511 0.190 147.835 147.279
M150 x 2 4g6g 0.038 149.962 149.682 148.663 148.545 0.118 147.797 147.313
M160 x 3 6g 0.048 159.952 159.577 158.003 157.779 0.224 156.704 155.931
M160 x 3 6h 0.000 160.000 159.625 158.051 157.827 0.224 156.752 155.979
M160 x 3 4g6g 0.048 159.952 159.577 158.003 157.863 0.140 156.704 156.015
M170 x 3 6g 0.048 169.952 169.577 168.003 167.779 0.224 166.704 165.931
M170 x 3 6h 0.000 170.000 169.625 168.051 167.827 0.224 166.752 165.979
M170 x 3 4g6g 0.048 169.952 169.577 168.003 167.863 0.140 166.704 166.015
M180 x 3 6g 0.048 179.952 179.577 178.003 177.779 0.224 176.704 175.931
M180 x 3 6h 0.000 180.000 179.625 178.051 177.827 0.224 176.752 175.979
M180 x 3 4g6g 0.048 179.952 179.577 178.003 177.863 0.140 176.704 176.015
M190 x 3 6g 0.048 189.952 189.577 188.003 187.753 0.250 186.704 185.905
M190 x 3 6h 0.000 190.000 189.625 188.051 187.801 0.250 186.752 185.953
M190 x 3 4g6g 0.048 189.952 189.577 188.003 187.843 0.160 186.704 185.995
M200 x 3 6g 0.048 199.952 199.577 198.003 197.753 0.250 196.704 195.905
M200 x 3 6h 0.000 200.000 199.625 198.051 197.801 0.250 196.752 195.953
M200 x 3 4g6g 0.048 199.952 199.577 198.003 197.843 0.160 196.704 195.995
  • GENERAL NOTE: All dimensions are in millimeters.
  • (1) es is absolute value.
  • (2) For coated threads with tolerance classes 6g or 4g6g.
  • (3) Dimension used in the design of tools, etc. In dimensioning external threads it is not normally specified. Generally, minor diameter acceptance is based on maximum material condition gaging.

Internal Thread - Limiting Dimensions M Profile (Cont’d)

Metric Coarse Thread 2

Basic Thread Designation Tolerance class Minor Diam., D1 Pitch Diam., D2 and Functional Diam Major Diam., D
Min. Max. Min. Max. Tol. Min. Max.
M1.6 x 0.35 6H 1.221 1.321 1.373 1.458 0.085 1.600 1.736
M2 x 0.4 6H 1.567 1.679 1.740 1.830 0.090 2.000 2.148
M2.5 x 0.45 6H 2.013 2.138 2.208 2.303 0.095 2.500 2.660
M3 x 0.5 6H 2.459 2.599 2.675 2.775 0.100 3.000 3.172
M3.5 x 0.6 6H 2.850 3.010 3.110 3.222 0.112 3.500 3.698
M4 x 0.7 6H 3.242 3.422 3.545 3.663 0.118 4.000 4.219
M5 x 0.8 6H 4.134 4.334 4.480 4.605 0.125 5.000 5.240
M6 x 1 6H 4.917 5.153 5.350 5.500 0.150 6.000 6.294
M8 x 1.25 6H 6.647 6.912 7.188 7.348 0.160 8.000 8.340
M8 x 1 6H 6.917 7.153 7.350 7.500 0.150 8.000 8.294
M10 x 1.5 6H 8.376 8.676 9.026 9.206 0.180 10.000 10.397
M10 x 1.25 6H 8.647 8.912 9.188 9.348 0.160 10.000 10.340
M10 x 1 6H 8.917 9.153 9.350 9.500 0.150 10.000 10.294
M10 x 0.75 6H 9.188 9.378 9.513 9.645 0.132 10.000 10.240
M12 x 1.75 6H 10.106 10.441 10.863 11.063 0.200 12.000 12.452
M12 x 1.5 6H 10.376 10.676 11.026 11.216 0.190 12.000 12.407
M12 x 1.25 6H 10.647 10.912 11.188 11.368 0.180 12.000 12.360
M12 x 1 6H 10.917 11.153 11.350 11.510 0.160 12.000 12.304
M14 x 2 6H 11.835 12.210 12.701 12.913 0.212 14.000 14.501
M14 x 1.5 6H 12.376 12.676 13.026 13.216 0.190 14.000 14.407
M15 x 1 6H 13.917 14.153 14.350 14.510 0.160 15.000 15.304
M16 x 2 6H 13.835 14.210 14.701 14.913 0.212 16.000 16.501
M16 x 1.5 6H 14.376 14.676 15.026 15.216 0.190 16.000 16.407
M17 x 1 6H 15.917 16.153 16.350 16.510 0.160 17.000 17.304
M18 x 1.5 6H 16.376 16.676 17.026 17.216 0.190 18.000 18.407
M20 x 2.5 6H 17.294 17.744 18.376 18.600 0.224 20.000 20.585
M20 x 1.5 6H 18.376 18.676 19.026 19.216 0.190 20.000 20.407
M20 x 1 6H 18.917 19.153 19.350 19.510 0.160 20.000 20.304
M22 x 2.5 6H 19.294 19.744 20.376 20.600 0.224 22.000 22.585
M22 x 1.5 6H 20.376 20.676 21.026 21.216 0.190 22.000 22.407
M24 x 3 6H 20.752 21.252 22.051 22.316 0.265 24.000 24.698
M24 x 2 6H 21.835 22.210 22.701 22.925 0.224 24.000 24.513
M25 x 1.5 6H 23.376 23.676 24.026 24.226 0.200 25.000 25.417
M27 x 3 6H 23.752 24.252 25.051 25.316 0.265 27.000 27.698
M27 x 2 6H 24.835 25.210 25.701 25.925 0.224 27.000 27.513
M30 x 3.5 6H 26.211 26.771 27.727 28.007 0.280 30.000 30.786
M30 x 2 6H 27.835 28.210 28.701 28.925 0.224 30.000 30.513
M30 x 1.5 6H 28.376 28.676 29.026 29.226 0.200 30.000 30.417
M33 x 2 6H 30.835 31.210 31.701 31.925 0.224 33.000 33.513
M35 x 1.5 6H 33.376 33.676 34.026 34.226 0.200 35.000 35.417
M36 x 4 6H 31.670 32.270 33.402 33.702 0.300 36.000 36.877
M36 x 2 6H 33.835 34.210 34.701 34.925 0.224 36.000 36.513
M39 x 2 6H 36.835 37.210 37.701 37.925 0.224 39.000 39.513
M40 x 1.5 6H 38.376 38.676 39.026 39.226 0.200 40.000 40.417
M42 x 4.5 6H 37.129 37.799 39.077 39.392 0.315 42.000 42.964
M42 x 2 6H 39.835 40.210 40.701 40.925 0.224 42.000 42.513
M45 x 1.5 6H 43.376 43.676 44.026 44.226 0.200 45.000 45.417
M48 x 5 6H 42.587 43.297 44.752 45.087 0.335 48.000 49.056
M48 x 2 6H 45.835 46.210 46.701 46.937 0.236 48.000 48.525
M50 x 1.5 6H 48.376 48.676 49.026 49.238 0.212 50.000 50.429
M55 x 1.5 6H 53.376 53.676 54.026 54.238 0.212 55.000 55.429
M56 x 5.5 6H 50.046 50.796 52.428 52.783 0.355 56.000 57.149
M56 x 2 6H 53.835 54.210 54.701 54.937 0.236 56.000 56.525
M60 x 1.5 6H 58.376 58.676 59.026 59.238 0.212 60.000 60.429
M64 x 6 6H 57.505 58.305 60.103 60.478 0.375 64.000 65.241
M64 x 2 6H 61.835 62.210 62.701 62.937 0.236 64.000 64.525
M65 x 1.5 6H 63.376 63.676 64.026 64.238 0.212 65.000 65.429
M70 x 1.5 6H 68.376 68.676 69.026 69.238 0.212 70.000 70.429
M72 x 6 6H 65.505 66.305 68.103 68.478 0.375 72.000 73.241
M72 x 2 6H 69.835 70.210 70.701 70.937 0.236 72.000 72.525
M75 x 1.5 6H 73.376 73.676 74.026 74.238 0.212 75.000 75.429
M80 x 6 6H 73.505 74.305 76.103 76.478 0.375 80.000 81.241
M80 x 2 6H 77.835 78.210 78.701 78.937 0.236 80.000 80.525
M80 x 1.5 6H 78.376 78.676 79.026 79.238 0.212 80.000 80.429
M85 x 2 6H 82.835 83.210 83.701 83.937 0.236 85.000 85.525
M90 x 6 6H 83.505 84.305 86.103 86.478 0.375 90.000 91.241
M90 x 2 6H 87.835 88.210 88.701 88.937 0.236 90.000 90.525
M95 x 2 6H 92.835 93.210 93.701 93.951 0.250 95.000 95.539
M100 x 6 6H 93.505 94.305 96.103 96.503 0.400 100.000 101.270
M100 x 2 6H 97.835 98.210 98.701 98.951 0.250 100.000 100.540
M105 x 2 6H 102.835 103.210 103.701 103.951 0.250 105.000 105.540
M110 x 2 6H 107.835 108.210 108.701 108.951 0.250 110.000 110.540
M120 x 2 6H 117.835 118.210 118.701 118.951 0.250 120.000 120.540
M130 x 2 6H 127.835 128.210 128.701 128.951 0.250 130.000 130.540
M140 x 2 6H 137.835 138.210 138.701 138.951 0.250 140.000 140.540
M150 x 2 6H 147.835 148.210 148.701 148.951 0.250 150.000 150.540
M160 x 3 6H 156.752 157.252 158.051 158.351 0.300 160.000 160.730
M170 x 3 6H 166.752 167.252 168.051 168.351 0.300 170.000 170.730
M180 x 3 6H 176.752 177.252 178.051 178.351 0.300 180.000 180.730
M190 x 3 6H 186.752 187.252 188.051 188.386 0.335 190.000 190.770
M200 x 3 6H 196.752 197.252 198.051 198.386 0.335 200.000 200.770
  • GENERAL NOTE: All dimensions are in millimeters.
  • (1) Dimension is used in the design of tools, etc. In dimensioning internal threads it is not normally specified. Generally, major diameter acceptance is based on maximum material condition gaging.
Application Comparison with Inch Threads

The metric M profile threads of tolerance class 6H/6g are intended for metric applications where the inch class 2A/2B have been used. At the minimum material limits, the 6H/6g results in a looser fit than the 2A/2B. Tabular data are also provided for a tighter tolerance fit external thread of class 4g6g which is approximately quivalent to the inch class 3A but with an allowance applied. It may be noted that a 4H5H/4h6h fit is approximately equivalent to class 3A/3B fit in the inch system.

Interchangeability with Other System Threads

Threads produced to this Standard ANSI/ASME B1.13M are fully interchangeable with threads conforming to other National Standards that are based on ISO 68 basic profile and ISO 965/1 tolerance practices. Threads produced to this Standard should be mechanically interchangeable with those produced to ANSI B1.18M-1982 (R1987) “Metric Screw Threads for Commercial Mechanical Fasteners - Boundary Profile Defined,” of the same size and tolerance class. However, there is a possibility that some parts may be accepted by conventional gages used for threads made to ANSI/ASME B1.13M and rejected by the Double-NOT-GO gages required for threads made to ANSI B1.18M. Threads produced in accordance with M profile and MJ profile ANSI/ASME B1.21M design data will assemble with each other. However, external MJ threads will encounter interference on the root radii with internal M thread crests when both threads are at maximum material condition