Metric threads, no matter the external one or inner one, are widely used on the CNC machined parts. Threads can take an important role for assembly, mating and functional adjustment. Our CNC machining services could provide you the parts with precise manufactured thread which is inspected with thread gauge to ensure the quality.
General Note: All dimensions are in millimeters.
| Metric External Thread Chart | |||||||
Thread Designation x Pitch | Tolerance | Major Dia. | Pitch Dia. | Minor Dia. | |||
| max. | min. | max. | min. | max. | min. | ||
| M1.6 x 0.35 | 6g | 1.581 | 1.496 | 1.354 | 1.291 | 1.202 | 1.075 |
| M2 x 0.25 | 6g | 1.982 | 1.915 | 1.820 | 1.764 | 1.711 | 1.610 |
| M2 x 0.4 | 6g | 1.981 | 1.886 | 1.721 | 1.654 | 1.548 | 1.408 |
| M2.5 x 0.35 | 6g | 2.481 | 2.396 | 2.254 | 2.191 | 2.102 | 1.998 |
| M2.5 x 0.45 | 6g | 2.480 | 2.380 | 2.188 | 2.117 | 1.993 | 1.840 |
| M2.6 x 0.45 | 6g | 2.580 | 2.480 | 2.288 | 2.217 | 2.093 | 1.940 |
| M3 x 0.35 | 6g | 2.981 | 2.896 | 2.754 | 2.687 | 2.602 | 2.471 |
| M3 x 0.5 | 6g | 2.980 | 2.874 | 2.655 | 2.580 | 2.438 | 2.272 |
| M3.5 x 0.6 | 6g | 3.479 | 3.354 | 3.089 | 3.004 | 2.829 | 2.634 |
| M4 x 0.5 | 6g | 3.980 | 3.874 | 3.655 | 3.580 | 3.439 | 3.272 |
| M4 x 0.7 | 6g | 3.978 | 3.838 | 3.523 | 3.433 | 3.220 | 3.002 |
| M5 x 0.5 | 6g | 4.980 | 4.874 | 4.655 | 4.580 | 4.439 | 4.272 |
| M5 x 0.8 | 6g | 4.976 | 4.826 | 4.456 | 4.361 | 4.110 | 3.868 |
| M6 x 0.5 | 6g | 5.980 | 5.874 | 5.655 | 5.570 | 5.439 | 5.262 |
| M6 x 0.75 | 6g | 5.978 | 5.838 | 5.491 | 5.391 | 5.166 | 4.929 |
| M6 x 1 | 6g | 5.974 | 5.794 | 5.324 | 5.212 | 4.891 | 4.596 |
| M7 x 0.5 | 6g | 6.980 | 6.874 | 6.655 | 6.570 | 6.439 | 6.262 |
| M7 x 1 | 6g | 6.974 | 6.794 | 6.324 | 6.212 | 5.891 | 5.596 |
| M8 x 0.5 | 6g | 7.980 | 7.874 | 7.655 | 7.570 | 7.439 | 7.262 |
| M8 x 0.75 | 6g | 7.978 | 7.838 | 7.491 | 7.391 | 7.166 | 6.929 |
| M8 x 1 | 6g | 7.974 | 7.794 | 7.324 | 7.212 | 6.891 | 6.596 |
| M8 x 1.25 | 6g | 7.972 | 7.760 | 7.160 | 7.042 | 6.619 | 6.272 |
| M9 x 0.5 | 6g | 8.980 | 8.874 | 8.655 | 8.570 | 8.439 | 8.262 |
| M9 x 1 | 6g | 8.972 | 8.794 | 8.324 | 8.212 | 7.891 | 7.596 |
| M9 x 1.25 | 6g | 8.972 | 8.760 | 8.160 | 8.042 | 7.619 | 7.272 |
| M10 x 0.75 | 6g | 9.978 | 9.838 | 9.491 | 9.391 | 9.166 | 8.929 |
| M10 x 1 | 6g | 9.974 | 9.794 | 9.324 | 9.212 | 8.891 | 8.596 |
| M10 x 1.25 | 6g | 9.972 | 9.760 | 9.160 | 9.042 | 8.619 | 8.272 |
| M10 x 1.5 | 6g | 9.968 | 9.732 | 8.994 | 8.862 | 8.344 | 7.938 |
| M11 x 0.5 | 6g | 10.980 | 10.874 | 10.655 | 10.570 | 10.439 | 10.262 |
| M11 x 1 | 6g | 10.974 | 10.794 | 10.324 | 10.212 | 9.891 | 9.596 |
| M11 x 1.5 | 6g | 10.968 | 10.732 | 9.994 | 9.862 | 9.344 | 8.938 |
| M12 x 0.5 | 6g | 11.980 | 11.874 | 11.655 | 11.565 | 11.439 | 11.257 |
| M12 x 1 | 6g | 11.974 | 11.794 | 11.324 | 11.206 | 10.891 | 10.590 |
| M12 x 1.25 | 6g | 11.972 | 11.760 | 11.160 | 11.028 | 10.619 | 10.258 |
| M12 x 1.5 | 6g | 11.968 | 11.732 | 10.994 | 10.854 | 10.344 | 9.930 |
| M12 x 1.75 | 6g | 11.966 | 11.701 | 10.829 | 10.679 | 10.071 | 9.601 |
| M14 x 0.5 | 6g | 13.980 | 13.874 | 13.655 | 13.565 | 13.439 | 13.257 |
| M14 x 1.5 | 6g | 13.968 | 13.732 | 12.994 | 12.854 | 12.344 | 11.930 |
| M14 x 2 | 6g | 13.962 | 13.682 | 12.663 | 12.503 | 11.797 | 11.271 |
Thread Designation x Pitch | Tolerance | Major Dia. | Pitch Dia. | Minor Dia. | |||
| max. | min. | max. | min. | max. | min. | ||
| M15 x 1 | 6g | 14.974 | 14.794 | 14.324 | 14.206 | 13.891 | 13.590 |
| M16 x 0.5 | 6g | 15.980 | 15.874 | 15.655 | 15.565 | 15.439 | 15.257 |
| M16 x 1.5 | 6g | 15.968 | 15.732 | 14.994 | 14.854 | 14.344 | 13.930 |
| M16 x 2 | 6g | 15.962 | 15.682 | 14.663 | 14.503 | 13.797 | 13.271 |
| M17 x 1 | 6g | 16.974 | 16.794 | 16.324 | 16.206 | 15.891 | 15.590 |
| M18 x 1 | 6g | 17.974 | 17.794 | 17.324 | 17.206 | 16.891 | 16.590 |
| M18 x 1.5 | 6g | 17.968 | 17.732 | 16.994 | 16.854 | 16.344 | 15.930 |
| M20 x 1 | 6g | 19.974 | 19.794 | 19.324 | 19.206 | 18.891 | 18.590 |
| M20 x 1.5 | 6g | 19.968 | 19.732 | 18.994 | 18.854 | 18.344 | 17.930 |
| M20 x 2.5 | 6g | 19.958 | 19.623 | 18.334 | 18.164 | 17.251 | 16.624 |
| M22 x 1.5 | 6g | 21.968 | 21.732 | 20.994 | 20.854 | 20.344 | 19.930 |
| M22 x 2.5 | 6g | 21.958 | 21.623 | 20.334 | 20.164 | 19.251 | 18.624 |
| M24 x 2 | 6g | 23.962 | 23.682 | 22.663 | 22.493 | 21.797 | 21.261 |
| M24 x 3 | 6g | 23.952 | 23.577 | 22.003 | 21.803 | 20.704 | 19.955 |
| M25 x 1.5 | 6g | 24.968 | 24.732 | 23.994 | 23.844 | 23.344 | 22.920 |
| M27 x 2 | 6g | 26.962 | 26.682 | 25.663 | 25.493 | 24.797 | 24.261 |
| M27 x 3 | 6g | 26.952 | 26.577 | 25.003 | 24.803 | 23.704 | 22.955 |
| M30 x 1.5 | 6g | 29.968 | 29.732 | 28.994 | 28.844 | 28.344 | 27.920 |
| M30 x 2 | 6g | 29.962 | 29.682 | 28.663 | 28.493 | 27.797 | 27.261 |
| M30 x 3.5 | 6g | 29.947 | 29.522 | 27.674 | 27.462 | 26.158 | 25.306 |
| M32 x 2 | 6g | 31.962 | 31.682 | 30.663 | 30.493 | 29.797 | 29.261 |
| M33 x 2 | 6g | 32.962 | 32.682 | 31.663 | 31.493 | 30.797 | 30.261 |
| M35 x 1.5 | 6g | 34.968 | 34.732 | 33.994 | 33.844 | 33.344 | 32.920 |
| M36 x 2 | 6g | 35.962 | 35.682 | 34.663 | 34.493 | 33.797 | 33.261 |
| M36 x 4 | 6g | 35.940 | 35.465 | 33.342 | 33.118 | 31.610 | 30.654 |
| M39 x 2 | 6g | 38.962 | 38.682 | 37.663 | 37.493 | 36.797 | 36.261 |
| M40 x 1.5 | 6g | 39.968 | 39.732 | 38.994 | 38.844 | 38.344 | 37.920 |
| M42 x 2 | 6g | 41.962 | 41.682 | 40.663 | 40.493 | 39.797 | 39.261 |
| M42 x 4.5 | 6g | 41.937 | 41.437 | 39.014 | 38.778 | 37.065 | 36.006 |
| M45 x 1.5 | 6g | 44.968 | 44.732 | 43.994 | 43.844 | 43.344 | 42.920 |
| M48 x 2 | 6g | 47.962 | 47.682 | 46.663 | 46.483 | 45.797 | 45.251 |
| M48 x 5 | 6g | 47.929 | 47.399 | 44.681 | 44.431 | 42.516 | 41.351 |
| M50 x 1.5 | 6g | 49.968 | 49.732 | 48.994 | 48.834 | 48.344 | 47.910 |
| M55 x 1.5 | 6g | 54.968 | 54.732 | 53.994 | 53.834 | 53.344 | 52.910 |
| M56 x 2 | 6g | 55.962 | 55.682 | 54.663 | 54.483 | 53.797 | 53.251 |
| M56 x 5.5 | 6g | 55.925 | 55.365 | 52.353 | 52.088 | 49.971 | 48.700 |
| M60 x 1.5 | 6g | 59.968 | 59.732 | 58.994 | 58.834 | 58.344 | 57.910 |
Metric Internal Thread Chart
An internal thread is usually manufactured by a thread tap or a thread cutter, depend on the size of the thread. To select the suitable thread cutting tool does matter for different kinds of raw material or thread dimensions. You are welcome to contact us If any questions about CNC machining threads.
| Metric Internal Thread Chart | |||||||
Thread | Tolerance | Minor Dia., D1 | Pitch Dia., D2 | Major Dia., D | |||
| min. | max. | min. | max. | min. | max. | ||
| M1.6 x 0.35 | 6H | 1.221 | 1.321 | 1.373 | 1.458 | 1.600 | 1.736 |
| M2 x 0.4 | 6H | 1.567 | 1.679 | 1.740 | 1.830 | 2.000 | 2.148 |
| M2.5 x 0.45 | 6H | 2.013 | 2.138 | 2.208 | 2.303 | 2.500 | 2.660 |
| M3 x 0.5 | 6H | 2.459 | 2.599 | 2.675 | 2.775 | 3.000 | 3.172 |
| M3.5 x 0.6 | 6H | 2.850 | 3.010 | 3.110 | 3.222 | 3.500 | 3.698 |
| M4 x 0.7 | 6H | 3.242 | 3.422 | 3.545 | 3.663 | 4.000 | 4.219 |
| M5 x 0.8 | 6H | 4.134 | 4.334 | 4.480 | 4.605 | 5.000 | 5.240 |
| M6 x 1 | 6H | 4.917 | 5.153 | 5.350 | 5.500 | 6.000 | 6.294 |
| M8 x 1.25 | 6H | 6.647 | 6.912 | 7.188 | 7.348 | 8.000 | 8.340 |
| M8 x 1 | 6H | 6.917 | 7.153 | 7.350 | 7.500 | 8.000 | 8.294 |
| M10 x 1.5 | 6H | 8.376 | 8.676 | 9.026 | 9.206 | 10.000 | 10.397 |
| M10 x 1.25 | 6H | 8.647 | 8.912 | 9.188 | 9.348 | 10.000 | 10.340 |
| M10 x 1 | 6H | 8.917 | 9.153 | 9.350 | 9.500 | 10.000 | 10.294 |
| M10 x 0.75 | 6H | 9.188 | 9.378 | 9.513 | 9.645 | 10.000 | 10.240 |
| M12 x 1.75 | 6H | 10.106 | 10.441 | 10.863 | 11.063 | 12.000 | 12.452 |
| M12 x 1.5 | 6H | 10.376 | 10.676 | 11.026 | 11.216 | 12.000 | 12.407 |
| M12 x 1.25 | 6H | 10.647 | 10.912 | 11.188 | 11.368 | 12.000 | 12.360 |
| M12 x 1 | 6H | 10.917 | 11.153 | 11.350 | 11.510 | 12.000 | 12.304 |
| M14 x 2 | 6H | 11.835 | 12.210 | 12.701 | 12.913 | 14.000 | 14.501 |
| M14 x 1.5 | 6H | 12.376 | 12.676 | 13.026 | 13.216 | 14.000 | 14.407 |
| M15 x 1 | 6H | 13.917 | 14.153 | 14.350 | 14.510 | 15.000 | 15.304 |
| M16 x 2 | 6H | 13.835 | 14.210 | 14.701 | 14.913 | 16.000 | 16.501 |
| M16 x 1.5 | 6H | 14.376 | 14.676 | 15.026 | 15.216 | 16.000 | 16.407 |
| M17 x 1 | 6H | 15.917 | 16.153 | 16.350 | 16.510 | 17.000 | 17.304 |
| M18 x 1.5 | 6H | 16.376 | 16.676 | 17.026 | 17.216 | 18.000 | 18.407 |
| M20 x 2.5 | 6H | 17.294 | 17.744 | 18.376 | 18.600 | 20.000 | 20.585 |
| M20 x 1.5 | 6H | 18.376 | 18.676 | 19.026 | 19.216 | 20.000 | 20.407 |
| M20 x 1 | 6H | 18.917 | 19.153 | 19.350 | 19.510 | 20.000 | 20.304 |
| M22 x 2.5 | 6H | 19.294 | 19.744 | 20.376 | 20.600 | 22.000 | 22.585 |
| M22 x 1.5 | 6H | 20.376 | 20.676 | 21.026 | 21.216 | 22.000 | 22.407 |
| M24 x 3 | 6H | 20.752 | 21.252 | 22.051 | 22.316 | 24.000 | 24.698 |
| M24 x 2 | 6H | 21.835 | 22.210 | 22.701 | 22.925 | 24.000 | 24.513 |
| M25 x 1.5 | 6H | 23.376 | 23.676 | 24.026 | 24.226 | 25.000 | 25.417 |
| M27 x 3 | 6H | 23.752 | 24.252 | 25.051 | 25.316 | 27.000 | 27.698 |
| M27 x 2 | 6H | 24.835 | 25.210 | 25.701 | 25.925 | 27.000 | 27.513 |
| M30 x 3.5 | 6H | 26.211 | 26.771 | 27.727 | 28.007 | 30.000 | 30.786 |
| M30 x 2 | 6H | 27.835 | 28.210 | 28.701 | 28.925 | 30.000 | 30.513 |
| M30 x 1.5 | 6H | 28.376 | 28.676 | 29.026 | 29.226 | 30.000 | 30.417 |
| M33 x 2 | 6H | 30.835 | 31.210 | 31.701 | 31.925 | 33.000 | 33.513 |
| M35 x 1.5 | 6H | 33.376 | 33.676 | 34.026 | 34.226 | 35.000 | 35.417 |
| M36 x 4 | 6H | 31.670 | 32.270 | 33.402 | 33.702 | 36.000 | 36.877 |
| M36 x 2 | 6H | 33.835 | 34.210 | 34.701 | 34.925 | 36.000 | 36.513 |
| M39 x 2 | 6H | 36.835 | 37.210 | 37.701 | 37.925 | 39.000 | 39.513 |
| M40 x 1.5 | 6H | 38.376 | 38.676 | 39.026 | 39.226 | 40.000 | 40.417 |
| M42 x 4.5 | 6H | 37.129 | 37.799 | 39.077 | 39.392 | 42.000 | 42.964 |
| M42 x 2 | 6H | 39.835 | 40.21 | 40.701 | 40.925 | 42.000 | 42.513 |
| M45 x 1.5 | 6H | 43.376 | 43.676 | 44.026 | 44.226 | 45.000 | 45.417 |
| M48 x 5 | 6H | 42.587 | 43.297 | 44.752 | 45.087 | 48.000 | 49.056 |
| M48 x 2 | 6H | 45.835 | 46.210 | 46.701 | 46.937 | 48.000 | 48.525 |
| M50 x 1.5 | 6H | 48.376 | 48.676 | 49.026 | 49.238 | 50.000 | 50.429 |
| M55 x 1.5 | 6H | 53.376 | 53.676 | 54.026 | 54.238 | 55.000 | 55.429 |
| M56 x 5.5 | 6H | 50.046 | 50.796 | 52.428 | 52.783 | 56.000 | 57.149 |
| M56 x 2 | 6H | 53.835 | 54.210 | 54.701 | 54.937 | 56.000 | 56.525 |
| M60 x 1.5 | 6H | 58.376 | 58.676 | 59.026 | 59.238 | 60.000 | 60.429 |
Copyright © HEHUA. CO., LTD. All rights reserved.