ISO Metric Screw Threads BS.3643


6g = Before Plating / 4h = After Plating

 


Nominal Diameter Pitch Tolerance Class Major Diameter Pitch
Diameter
Minor Diameter Min
Max Min Max Min
M3 0.5 6g 2.980 2.874 2.655 2.580 2.272
4h 3.000 2.933 2.675 2.627 2.319
M4 0.7 6g 3.978 3.838 3.523 3.433 3.002
4h 4.000 3.910 3.545 3.489 3.058
M5 0.8 6g 4.976 4.826 4.456 4.361 3.868
4h 5.000 4.905 4.480 4.420 3.927
M6 1.0 6g 5.974 5.794 5.324 5.212 4.597
4h 6.000 5.888 5.350 5.279 4.663
M8 1.25 6g 7.972 7.760 7.160 7.042 6.272
4h 8.000 7.868 7.188 7.113 6.343
M10 1.5 6g 9.968 9.732 8.994 8.862 7.938
4h 10.000 9.850 9.026 8.941 8.018
M12 1.75 6g 11.966 11.701 10.829 10.679 9.602
4h 12.000 11.830 10.863 10.768 9.692
M16 2.0 6g 15.962 15.682 14.663 14.503 13.271
4h 16.000 15.820 14.701 14.601 13.369

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