External Metric Thread Table Chart and Fastener Sizes M1.6 - M18
ISO Hardware Engineering Data Fastener and Screw / Bolt Design, Formula and Calculations
The following table chart defines standard metric external thread size M1.6 to M18 per. ANSI/ASME B1.13M-1995. These thread sizes and classes represent bolts and screws, as well, as other standard external threads. Do not use these values for standard metric internal thread design. All units in mm. These are the M Profile limiting Dimensionings.
Where:
H = P ( 31/2 / 2 ) = 0.866025 P or 0.125H = 0.108253P
ISO Metric | Pitch | External Threads | ||||||
Tolerance | Major Dia | Pitch Dia | Minor Dia | |||||
Max | Min | Max | Min | Max | Min | |||
M1.6 x 0.35 | 0.35 | 6g | 1.581 | 1.496 | 1.354 | 1.291 | 1.202 | 1.075 |
M1.6 x 0.35 | 0.35 | 4g6g | 1.581 | 1.496 | 1.354 | 1.314 | 1.202 | 1.098 |
M1.6 x 0.3 | 0.3 | 6g | 1.582 | 1.507 | 1.387 | 1.342 | 1.257 | 1.157 |
M1.6 x 0.3 | 0.3 | 4g6g | 1.582 | 1.507 | 1.387 | 1.359 | 1.257 | 1.174 |
M1.6 x 0.2 | 0.2 | 6g | 1.583 | 1.527 | 1.453 | 1.403 | 1.366 | 1.280 |
M1.6 x 0.2 | 0.2 | 4g6g | 1.583 | 1.527 | 1.453 | 1.421 | 1.366 | 1.298 |
M1.7 x 0.35 | 0.35 | 6g | 1.681 | 1.596 | 1.454 | 1.391 | 1.302 | 1.175 |
M1.7 x 0.35 | 0.35 | 4g6g | 1.681 | 1.596 | 1.454 | 1.414 | 1.302 | 1.198 |
M1.8 x 0.35 | 0.35 | 6g | 1.781 | 1.696 | 1.554 | 1.491 | 1.402 | 1.275 |
M1.8 x 0.35 | 0.35 | 4g6g | 1.781 | 1.696 | 1.554 | 1.514 | 1.402 | 1.298 |
M1.8 x 0.2 | 0.2 | 6g | 1.783 | 1.727 | 1.653 | 1.603 | 1.566 | 1.480 |
M1.8 x 0.2 | 0.2 | 4g6g | 1.783 | 1.727 | 1.653 | 1.621 | 1.566 | 1.498 |
M2 x 0.4 | 0.4 | 6g | 1.981 | 1.886 | 1.721 | 1.654 | 1.548 | 1.408 |
M2 x 0.4 | 0.4 | 4g6g | 1.981 | 1.886 | 1.721 | 1.679 | 1.548 | 1.433 |
M2 x 0.25 | 0.25 | 6g | 1.982 | 1.915 | 1.820 | 1.764 | 1.711 | 1.610 |
M2 x 0.25 | 0.25 | 4g6g | 1.982 | 1.915 | 1.820 | 1.784 | 1.711 | 1.630 |
M2.2 x 0.45 | 0.45 | 6g | 2.180 | 2.080 | 1.888 | 1.817 | 1.693 | 1.540 |
M2.2 x 0.45 | 0.45 | 4g6g | 2.180 | 2.080 | 1.888 | 1.843 | 1.693 | 1.566 |
M2.2 x 0.25 | 0.25 | 6g | 2.182 | 2.115 | 2.020 | 1.964 | 1.911 | 1.810 |
M2.2 x 0.25 | 0.25 | 4g6g | 2.182 | 2.115 | 2.020 | 1.984 | 1.911 | 1.830 |
M2.3 x 0.45 | 0.45 | 6g | 2.280 | 2.180 | 1.988 | 1.917 | 1.793 | 1.640 |
M2.3 x 0.45 | 0.45 | 4g6g | 2.280 | 2.180 | 1.988 | 1.943 | 1.793 | 1.666 |
M2.3 x 0.4 | 0.4 | 6g | 2.281 | 2.186 | 2.021 | 1.954 | 1.848 | 1.708 |
M2.3 x 0.4 | 0.4 | 4g6g | 2.281 | 2.186 | 2.021 | 1.979 | 1.848 | 1.733 |
M2.5 x 0.45 | 0.45 | 6g | 2.480 | 2.380 | 2.188 | 2.117 | 1.993 | 1.840 |
M2.5 x 0.45 | 0.45 | 4g6g | 2.480 | 2.380 | 2.188 | 2.143 | 1.993 | 1.866 |
M2.5 x 0.35 | 0.35 | 6g | 2.481 | 2.396 | 2.254 | 2.191 | 2.102 | 1.975 |
M2.5 x 0.35 | 0.35 | 4g6g | 2.481 | 2.396 | 2.254 | 2.214 | 2.102 | 1.998 |
M2.6 x 0.45 | 0.45 | 6g | 2.580 | 2.480 | 2.288 | 2.217 | 2.093 | 1.940 |
M2.6 x 0.45 | 0.45 | 4g6g | 2.580 | 2.480 | 2.288 | 2.243 | 2.093 | 1.966 |
M3 x 0.5 | 0.5 | 6g | 2.980 | 2.874 | 2.655 | 2.580 | 2.439 | 2.272 |
M3 x 0.5 | 0.5 | 4g6g | 2.980 | 2.874 | 2.655 | 2.607 | 2.439 | 2.299 |
M3 x 0.35 | 0.35 | 6g | 2.981 | 2.896 | 2.754 | 2.687 | 2.602 | 2.471 |
M3 x 0.35 | 0.35 | 4g6g | 2.981 | 2.896 | 2.754 | 2.712 | 2.602 | 2.496 |
M3.5 x 0.6 | 0.6 | 6g | 3.479 | 3.354 | 3.089 | 3.004 | 2.829 | 2.635 |
M3.5 x 0.6 | 0.6 | 4g6g | 3.479 | 3.354 | 3.089 | 3.036 | 2.829 | 2.667 |
M3.5 x 0.35 | 0.35 | 6g | 3.481 | 3.396 | 3.254 | 3.187 | 3.102 | 2.971 |
M3.5 x 0.35 | 0.35 | 4g6g | 3.481 | 3.396 | 3.254 | 3.212 | 3.102 | 2.996 |
M4 x 0.7 | 0.7 | 6g | 3.978 | 3.838 | 3.523 | 3.433 | 3.220 | 3.002 |
M4 x 0.7 | 0.7 | 4g6g | 3.978 | 3.838 | 3.523 | 3.467 | 3.220 | 3.036 |
M4 x 0.5 | 0.5 | 6g | 3.980 | 3.874 | 3.655 | 3.580 | 3.439 | 3.272 |
M4 x 0.5 | 0.5 | 4g6g | 3.980 | 3.874 | 3.655 | 3.607 | 3.439 | 3.299 |
M4.5 x 0.75 | 0.75 | 6g | 4.478 | 4.338 | 3.991 | 3.901 | 3.666 | 3.439 |
M4.5 x 0.75 | 0.75 | 4g6g | 4.478 | 4.338 | 3.991 | 3.935 | 3.666 | 3.473 |
M4.5 x 0.5 | 0.5 | 6g | 4.480 | 4.374 | 4.155 | 4.080 | 3.939 | 3.772 |
M4.5 x 0.5 | 0.5 | 4g6g | 4.480 | 4.374 | 4.155 | 4.107 | 3.939 | 3.799 |
M5 x 0.8 | 0.8 | 6g | 4.976 | 4.826 | 4.456 | 4.361 | 4.110 | 3.869 |
M5 x 0.8 | 0.8 | 4g6g | 4.976 | 4.826 | 4.456 | 4.396 | 4.110 | 3.904 |
M5 x 0.5 | 0.5 | 6g | 4.980 | 4.874 | 4.655 | 4.580 | 4.439 | 4.272 |
M5 x 0.5 | 0.5 | 4g6g | 4.980 | 4.874 | 4.655 | 4.607 | 4.439 | 4.299 |
M5.5 x 0.5 | 0.5 | 6g | 5.480 | 5.374 | 5.155 | 5.065 | 4.939 | 4.757 |
M5.5 x 0.5 | 0.5 | 4g6g | 5.480 | 5.374 | 5.155 | 5.099 | 4.939 | 4.791 |
M6 x 1 | 1 | 6g | 5.974 | 5.794 | 5.324 | 5.212 | 4.891 | 4.596 |
M6 x 1 | 1 | 4g6g | 5.974 | 5.794 | 5.324 | 5.253 | 4.891 | 4.637 |
M6 x 0.8 | 0.8 | 6g | 5.976 | 5.826 | 5.456 | 5.376 | 5.110 | 4.884 |
M6 x 0.8 | 0.8 | 4g6g | 5.976 | 5.826 | 5.456 | 5.406 | 5.110 | 4.914 |
M6 x 0.75 | 0.75 | 6g | 5.978 | 5.838 | 5.491 | 5.391 | 5.166 | 4.929 |
M6 x 0.75 | 0.75 | 4g6g | 5.978 | 5.838 | 5.491 | 5.428 | 5.166 | 4.966 |
M6 x 0.7 | 0.7 | 6g | 5.978 | 5.838 | 5.523 | 5.428 | 5.220 | 4.997 |
M6 x 0.7 | 0.7 | 4g6g | 5.978 | 5.838 | 5.523 | 5.463 | 5.220 | 5.032 |
M6 x 0.5 | 0.5 | 6g | 5.980 | 5.874 | 5.655 | 5.570 | 5.439 | 5.262 |
M6 x 0.5 | 0.5 | 4g6g | 5.980 | 5.874 | 5.655 | 5.602 | 5.439 | 5.294 |
M7 x 1 | 1 | 6g | 6.974 | 6.794 | 6.324 | 6.212 | 5.891 | 5.596 |
M7 x 1 | 1 | 4g6g | 6.974 | 6.794 | 6.324 | 6.253 | 5.891 | 5.637 |
M7 x 0.75 | 0.75 | 6g | 6.978 | 6.838 | 6.491 | 6.391 | 6.166 | 5.929 |
M7 x 0.75 | 0.75 | 4g6g | 6.978 | 6.838 | 6.491 | 6.428 | 6.166 | 5.966 |
M7 x 0.5 | 0.5 | 6g | 6.980 | 6.874 | 6.655 | 6.570 | 6.439 | 6.262 |
M7 x 0.5 | 0.5 | 4g6g | 6.980 | 6.874 | 6.655 | 6.602 | 6.439 | 6.294 |
M8 x 1.25 | 1.25 | 6g | 7.972 | 7.760 | 7.160 | 7.042 | 6.619 | 6.272 |
M8 x 1.25 | 1.25 | 4g6g | 7.972 | 7.760 | 7.160 | 7.085 | 6.619 | 6.315 |
M8 x 1 | 1 | 6g | 7.974 | 7.794 | 7.324 | 7.212 | 6.891 | 6.596 |
M8 x 1 | 1 | 4g6g | 7.974 | 7.794 | 7.324 | 7.253 | 6.891 | 6.637 |
M8 x 0.8 | 0.8 | 6g | 7.976 | 7.826 | 7.456 | 7.350 | 7.110 | 6.858 |
M8 x 0.8 | 0.8 | 4g6g | 7.976 | 7.826 | 7.456 | 7.389 | 7.110 | 6.897 |
M8 x 0.75 | 0.75 | 6g | 7.978 | 7.838 | 7.491 | 7.391 | 7.166 | 6.929 |
M8 x 0.75 | 0.75 | 4g6g | 7.978 | 7.838 | 7.491 | 7.428 | 7.166 | 6.966 |
M8 x 0.5 | 0.5 | 6g | 7.980 | 7.874 | 7.655 | 7.570 | 7.439 | 7.262 |
M8 x 0.5 | 0.5 | 4g6g | 7.980 | 7.874 | 7.655 | 7.602 | 7.439 | 7.294 |
M9 x 1.25 | 1.25 | 6g | 8.972 | 8.760 | 8.160 | 8.042 | 7.619 | 7.272 |
M9 x 1.25 | 1.25 | 4g6g | 8.972 | 8.760 | 8.160 | 8.085 | 7.619 | 7.315 |
M9 x 1 | 1 | 6g | 8.974 | 8.794 | 8.324 | 8.212 | 7.891 | 7.596 |
M9 x 1 | 1 | 4g6g | 8.974 | 8.794 | 8.324 | 8.253 | 7.891 | 7.637 |
M9 x 0.75 | 0.75 | 6g | 8.978 | 8.838 | 8.491 | 8.391 | 8.166 | 7.929 |
M9 x 0.75 | 0.75 | 4g6g | 8.978 | 8.838 | 8.491 | 8.428 | 8.166 | 7.966 |
M9 x 0.5 | 0.5 | 6g | 8.980 | 8.874 | 8.655 | 8.570 | 8.439 | 8.262 |
M9 x 0.5 | 0.5 | 4g6g | 8.980 | 8.874 | 8.655 | 8.602 | 8.439 | 8.294 |
M10 x 1.5 | 1.5 | 6g | 9.968 | 9.732 | 8.994 | 8.862 | 8.344 | 7.938 |
M10 x 1.5 | 1.5 | 4g6g | 9.968 | 9.732 | 8.994 | 8.909 | 8.344 | 7.985 |
M10 x 1.25 | 1.25 | 6g | 9.972 | 9.760 | 9.160 | 9.042 | 8.619 | 8.272 |
M10 x 1.25 | 1.25 | 4g6g | 9.972 | 9.760 | 9.160 | 9.085 | 8.619 | 8.315 |
M10 x 1.12 | 1.12 | 6g | 9.973 | 9.783 | 9.246 | 9.128 | 8.761 | 8.438 |
M10 x 1.12 | 1.12 | 4g6g | 9.973 | 9.783 | 9.246 | 9.171 | 8.761 | 8.481 |
M10 x 1 | 1 | 6g | 9.974 | 9.794 | 9.324 | 9.212 | 8.891 | 8.596 |
M10 x 1 | 1 | 4g6g | 9.974 | 9.794 | 9.324 | 9.253 | 8.891 | 8.637 |
M10 x 0.75 | 0.75 | 6g | 9.978 | 9.838 | 9.491 | 9.391 | 9.166 | 8.929 |
M10 x 0.75 | 0.75 | 4g6g | 9.978 | 9.838 | 9.491 | 9.428 | 9.166 | 8.966 |
M10 x 0.5 | 0.5 | 6g | 9.980 | 9.874 | 9.655 | 9.570 | 9.439 | 9.262 |
M10 x 0.5 | 0.5 | 4g6g | 9.980 | 9.874 | 9.655 | 9.602 | 9.439 | 9.294 |
M11 x 1.5 | 1.5 | 6g | 10.968 | 10.732 | 9.994 | 9.862 | 9.344 | 8.938 |
M11 x 1.5 | 1.5 | 4g6g | 10.968 | 10.732 | 9.994 | 9.911 | 9.344 | 8.987 |
M11 x 1 | 1 | 6g | 10.974 | 10.794 | 10.324 | 10.212 | 9.891 | 9.596 |
M11 x 1 | 1 | 4g6g | 10.974 | 10.794 | 10.324 | 10.253 | 9.891 | 9.637 |
M11 x 0.75 | 0.75 | 6g | 10.978 | 10.838 | 10.491 | 10.391 | 10.166 | 9.929 |
M11 x 0.75 | 0.75 | 4g6g | 10.978 | 10.838 | 10.491 | 10.428 | 10.166 | 9.966 |
M11 x 0.5 | 0.5 | 6g | 10.980 | 10.874 | 10.655 | 10.570 | 10.439 | 10.262 |
M11 x 0.5 | 0.5 | 4g6g | 10.980 | 10.874 | 10.655 | 10.602 | 10.439 | 10.294 |
M12 x 1.75 | 1.75 | 6g | 11.966 | 11.701 | 10.829 | 10.679 | 10.072 | 9.601 |
M12 x 1.75 | 1.75 | 4g6g | 11.966 | 11.701 | 10.829 | 10.734 | 10.072 | 9.656 |
M12 x 1.5 | 1.5 | 6g | 11.968 | 11.732 | 10.994 | 10.854 | 10.344 | 9.930 |
M12 x 1.25 | 1.25 | 6g | 11.972 | 11.760 | 11.160 | 11.028 | 10.619 | 10.258 |
M12 x 1.25 | 1.25 | 4g6g | 11.972 | 11.760 | 11.160 | 11.075 | 10.619 | 10.305 |
M12 x 1 | 1 | 6g | 11.974 | 11.794 | 11.324 | 11.206 | 10.891 | 10.590 |
M12 x 1 | 1 | 4g6g | 11.974 | 11.794 | 11.324 | 11.249 | 10.891 | 10.633 |
M12 x 0.75 | 0.75 | 6g | 11.978 | 11.838 | 11.491 | 11.385 | 11.166 | 10.923 |
M12 x 0.75 | 0.75 | 4g6g | 11.978 | 11.838 | 11.491 | 11.424 | 11.166 | 10.962 |
M12 x 0.5 | 0.5 | 6g | 11.980 | 11.874 | 11.655 | 11.565 | 11.439 | 11.257 |
M12 x 0.5 | 0.5 | 4g6g | 11.980 | 11.874 | 11.655 | 11.598 | 11.439 | 11.290 |
M14 x 2 | 2 | 6g | 13.962 | 13.682 | 12.663 | 12.503 | 11.797 | 11.271 |
M14 x 2 | 2 | 4g6g | 13.962 | 13.682 | 12.663 | 12.563 | 11.797 | 11.331 |
M14 x 1.5 | 1.5 | 6g | 13.968 | 13.732 | 12.994 | 12.854 | 12.344 | 11.930 |
M14 x 1.5 | 1.5 | 4g6g | 13.968 | 13.732 | 12.994 | 12.904 | 12.344 | 11.980 |
M14 x 1.25 | 1.25 | 6g | 13.972 | 13.760 | 13.160 | 13.028 | 12.619 | 12.258 |
M14 x 1.25 | 1.25 | 4g6g | 13.972 | 13.760 | 13.160 | 13.075 | 12.619 | 12.305 |
M14 x 1 | 1 | 6g | 13.974 | 13.794 | 13.324 | 13.206 | 12.891 | 12.590 |
M14 x 1 | 1 | 4g6g | 13.974 | 13.794 | 13.324 | 13.250 | 12.891 | 12.634 |
M14 x 0.75 | 0.75 | 6g | 13.978 | 13.838 | 13.491 | 13.385 | 13.166 | 12.923 |
M14 x 0.75 | 0.75 | 4g6g | 13.978 | 13.838 | 13.491 | 13.424 | 13.166 | 12.962 |
M14 x 0.5 | 0.5 | 6g | 13.980 | 13.874 | 13.655 | 13.565 | 13.439 | 13.257 |
M14 x 0.5 | 0.5 | 4g6g | 13.980 | 13.874 | 13.655 | 13.598 | 13.439 | 13.290 |
M15 x 1.5 | 1.5 | 6g | 14.968 | 14.732 | 13.994 | 13.854 | 13.344 | 12.930 |
M15 x 1.5 | 1.5 | 4g6g | 14.968 | 14.732 | 13.994 | 13.904 | 13.344 | 12.980 |
M15 x 1 | 1 | 6g | 14.974 | 14.794 | 14.324 | 14.206 | 13.891 | 13.590 |
M15 x 1 | 1 | 4g6g | 14.974 | 14.794 | 14.324 | 14.249 | 13.891 | 13.633 |
M16 x 2 | 2 | 6g | 15.962 | 15.682 | 14.663 | 14.503 | 13.797 | 13.271 |
M16 x 2 | 2 | 4g6g | 15.962 | 15.682 | 14.663 | 14.563 | 13.797 | 13.331 |
M16 x 1.6 | 1.6 | 6g | 15.968 | 15.756 | 14.929 | 14.824 | 14.236 | 13.838 |
M16 x 1.6 | 1.6 | 4g6g | 15.968 | 15.756 | 14.929 | 14.863 | 14.236 | 13.877 |
M16 x 1.5 | 1.5 | 6g | 15.968 | 15.732 | 14.994 | 14.854 | 14.344 | 13.930 |
M16 x 1.5 | 1.5 | 4g6g | 15.968 | 15.732 | 14.994 | 14.904 | 14.344 | 13.980 |
M16 x 1.25 | 1.25 | 6g | 15.972 | 15.760 | 15.160 | 15.028 | 14.619 | 14.258 |
M16 x 1.25 | 1.25 | 4g6g | 15.972 | 15.760 | 15.160 | 15.075 | 14.619 | 14.305 |
M16 x 1 | 1 | 6g | 15.974 | 15.794 | 15.324 | 15.206 | 14.891 | 14.590 |
M16 x 1 | 1 | 4g6g | 15.974 | 15.794 | 15.324 | 15.249 | 14.891 | 14.633 |
M16 x 0.75 | 0.75 | 6g | 15.978 | 15.838 | 15.491 | 15.385 | 15.166 | 14.923 |
M16 x 0.75 | 0.75 | 4g6g | 15.978 | 15.838 | 15.491 | 15.424 | 15.166 | 14.962 |
M16 x 0.5 | 0.5 | 6g | 15.980 | 15.874 | 15.655 | 15.565 | 15.439 | 15.257 |
M16 x 0.5 | 0.5 | 4g6g | 15.980 | 15.874 | 15.655 | 15.599 | 15.439 | 15.291 |
M17 x 1.5 | 1.5 | 6g | 16.968 | 16.732 | 15.994 | 15.854 | 15.344 | 14.930 |
M17 x 1.5 | 1.5 | 4g6g | 16.968 | 16.732 | 15.994 | 15.904 | 15.344 | 14.980 |
M17 x 1 | 1 | 6g | 16.974 | 16.794 | 16.324 | 16.206 | 15.891 | 15.590 |
M17 x 1 | 1 | 4g6g | 16.974 | 16.794 | 16.324 | 16.249 | 15.891 | 15.633 |
M18 x 2.5 | 2.5 | 6g | 17.958 | 17.623 | 16.334 | 16.164 | 15.252 | 14.624 |
M18 x 2.5 | 2.5 | 4g6g | 17.958 | 17.623 | 16.334 | 16.228 | 15.252 | 14.688 |
M18 x 2 | 2 | 6g | 17.962 | 17.682 | 16.663 | 16.503 | 15.797 | 15.271 |
M18 x 2 | 2 | 4g6g | 17.962 | 17.682 | 16.663 | 16.563 | 15.797 | 15.331 |
M18 x 1.5 | 1.5 | 6g | 17.968 | 17.732 | 16.994 | 16.854 | 16.344 | 15.930 |
M18 x 1.5 | 1.5 | 4g6g | 17.968 | 17.732 | 16.994 | 16.904 | 16.344 | 15.980 |
M18 x 1.25 | 1.25 | 6g | 17.972 | 17.760 | 17.160 | 17.028 | 16.619 | 16.258 |
M18 x 1.25 | 1.25 | 4g6g | 17.972 | 17.760 | 17.160 | 17.075 | 16.619 | 16.305 |
M18 x 1 | 1 | 6g | 17.974 | 17.794 | 17.324 | 17.206 | 16.891 | 16.590 |
M18 x 1 | 1 | 4g6g | 17.974 | 17.794 | 17.324 | 17.249 | 16.891 | 16.633 |
M18 x 0.75 | 0.75 | 6g | 17.978 | 17.838 | 17.491 | 17.385 | 17.166 | 16.923 |
M18 x 0.75 | 0.75 | 4g6g | 17.978 | 17.838 | 17.491 | 17.424 | 17.166 | 16.962 |
M18 x 0.5 | 0.5 | 6g | 17.980 | 17.874 | 17.655 | 17.565 | 17.439 | 17.257 |
M18 x 0.5 | 0.5 | 4g6g | 17.980 | 17.874 | 17.655 | 17.599 | 17.439 | 17.291 |
Related:
- ANSI Inch Unit Hardware Design Guide
- Length of Screw Thread Engagement per. ISO 965-1 Calculator, Formula and Table Length of engagement of mating threads is selected to utilize full tensile strength of a bolt prior to shearing and nut threads.
- Fastener Thread Designations and Definitions Pitch, Minor, Major Diameters
- Standard External Metric Thread and Fastener Sizes M 0.25 - M 1.4
- Metric External Table Chart Thread Sizes M 20 - M 55
- Metric External Table Chart Thread Sizes M 56 - M 78
- Metric External Table Chart Thread Sizes M 80 - M 100
- Metric External Table Chart Thread Sizes M 105 - M 135
- Metric External Table Chart Thread Sizes M 140 to M 175
- Metric External Table Chart Thread Sizes M 180 to M 255
- Metric External Table Chart Thread Sizes M 260 to M 1060
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