METRIC THREAD GAGE STANDARD PITCH DIAMETER CHART   NOMINAL SIZE & PITCH FOR EXTERNAL THREADS FOR INTERNAL THREADS PITCH DIAMETER PITCH DIAMETER PITCH DIAMETER PITCH DIAMETER GO RING GAGE NO GO RING GAGE GO PLUG GAGE NO GO PLUG GAGE 6g TOLERANCE 6g TOLERANCE 6H TOLERANCE 6H TOLERANCE MM IN.(REF) MM IN.(REF) MM IN.(REF) MM IN.(REF) M1.6 X 0.35 1.354 0.05331 1.291 0.05083 1.373 0.05406 1.458 0.05740 M2 X 0.4 1.721 0.06776 1.654 0.06512 1.740 0.06850 1.830 0.07205 M2.5 X 0.45 2.188 0.08614 2.117 0.08335 2.208 0.08693 2.303 0.09067 M3 X 0.5 2.655 0.10453 2.580 0.10157 2.675 0.10531 2.775 0.10925 M3.5 X 0.6 3.089 0.12161 3.004 0.11827 3.110 0.12244 3.222 0.12685 M4 X 0.7 3.523 0.13870 3.433 0.13516 3.545 0.13957 3.663 0.14421 M5 X 0.8 4.456 0.17543 4.361 0.17169 4.480 0.17638 4.605 0.18130 M6 X 1.0 5.324 0.20961 5.212 0.20520 5.350 0.21063 5.500 0.21654 M8 X 1.25 7.160 0.28189 7.042 0.27724 7.188 0.28299 7.348 0.28929 M8 X 1.0 7.324 0.28835 7.212 0.28394 7.350 0.28937 7.500 0.29528 M10 X 1.5 8.994 0.35409 8.862 0.34890 9.026 0.35535 9.206 0.36244 M10 X 1.25 9.160 0.36063 9.042 0.35598 9.188 0.36173 9.348 0.36803 M10 X 1.0 9.324 0.36709 9.212 0.36268 9.350 0.36811 9.500 0.37402 M10 X 0.75 9.491 0.37366 9.391 0.36972 9.513 0.37453 9.645 0.37972 M12 X 1.75 10.829 0.42634 10.679 0.42043 10.863 0.42768 11.063 0.43555 M12 X 1.5 10.994 0.43283 10.854 0.42732 11.026 0.43409 11.216 0.44157 M12 X 1.25 11.160 0.43937 11.028 0.43417 11.188 0.44047 11.368 0.44756 M12 X 1.0 11.324 0.44583 11.206 0.44118 11.350 0.44685 11.510 0.45315 M14 X 2.0 12.663 0.49854 12.503 0.49224 12.701 0.50004 12.913 0.50839 M14 X 1.5 12.994 0.51157 12.854 0.50606 13.026 0.51283 13.216 0.52031 M15 X 1.0 14.324 0.56394 14.026 0.55929 14.350 0.56496 14.510 0.57126 M16 X 2.0 14.663 0.57728 14.503 0.57098 14.701 0.57878 14.913 0.58713 M16 X 1.5 14.994 0.59031 14.854 0.58480 15.026 0.59157 15.216 0.59906 M17 X 1.0 16.324 0.64268 16.206 0.63803 16.350 0.64370 16.510 0.65000 M18 X 1.5 16.994 0.66906 16.854 0.66354 17.026 0.67031 17.216 0.67780 M20 X 2.5 18.334 0.72181 18.164 0.71512 18.376 0.72346 18.600 0.73228 M20 X 1.5 18.994 0.74780 18.854 0.74228 19.026 0.74906 19.216 0.75654 M20 X 1.0 19.324 0.76079 19.206 0.75614 19.350 0.76181 19.510 0.76811 M22 X 2.5 20.334 0.80055 20.164 0.79386 20.376 0.80220 20.600 0.81102 M22 X 1.5 20.994 0.82654 20.854 0.82102 21.026 0.82780 21.216 0.83528 M24 X 3.0 22.003 0.86626 21.803 0.85839 22.051 0.86815 22.316 0.87858 M24 X 2.0 22.663 0.89224 22.493 0.88555 22.701 0.89374 22.925 0.90256 M25 X 1.5 23.994 0.94465 23.844 0.93874 24.026 0.94591 24.226 0.95378 M27 X 3.0 25.003 0.98437 24.803 0.97650 25.051 0.98626 25.316 0.99669 M27 X 2.0 25.663 1.01035 25.493 1.00366 25.701 1.01185 25.925 1.02067 M30 X 3.5 27.674 1.08953 27.642 1.08118 27.727 1.09161 28.007 1.10264 M30 X 2.0 28.663 1.12846 28.493 1.12177 28.701 1.12996 28.925 1.13878 M30 X 1.5 28.994 1.14150 28.844 1.13559 29.026 1.14276 29.226 1.15063 M33 X 2.0 31.663 1.24657 31.493 1.23988 31.701 1.24807 31.925 1.25689 M35 X 1.5 33.994 1.33835 33.844 1.33244 34.026 1.33961 34.226 1.34748 M36 X 4.0 33.342 1.31268 33.118 1.30386 33.402 1.31504 33.702 1.32685 M36 X 2.0 34.663 1.36469 34.493 1.35799 34.701 1.36618 34.925 1.37500 M39 X 2.0 37.663 1.48280 37.493 1.47610 37.701 1.48429 37.925 1.49311 ANSI/ASME B1.13M-1995, Metric Screw Threads - MProfile
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