Table 3. American National Standard Preferred Hole Basis Metric Transition and Interference Fits ANSI/ASME B4.2-1978 (R2009) Basic Size a Locational Transition Locational Transition Locational Interference Medium Drive Force Hole H7 Shaft k6 Fit b Hole H7 Shaft n6 Fit b Hole H7 Shaft p6 Fit b Hole H7 Shaft s6 Fit b Hole H7 Shaft u6 Fit b 1 Max 1.010 1.006 +0.010 1.010 1.010 +0.006 1.010 1.012 +0.004 1.010 1.020 –0.004 1.010 1.024 –0.008 Min 1.000 1.000 –0.006 1.000 1.004 –0.010 1.000 1.006 –0.012 1.000 1.014 –0.020 1.000 1.018 –0.024 1.2 Max 1.210 1.206 +0.010 1.210 1.210 +0.006 1.210 1.212 +0.004 1.210 1.220 –0.004 1.210 1.224 –0.008 Min 1.200 1.200 –0.006 1.200 1.204 –0.010 1.200 1.206 –0.012 1.200 1.214 –0.020 1.200 1.218 –0.024 1.6 Max 1.610 1.606 +0.010 1.610 1.610 +0.006 1.610 1.612 +0.004 1.610 1.620 –0.004 1.610 1.624 –0.008 Min 1.600 1.600 –0.006 1.600 1.604 –0.010 1.600 1.606 –0.012 1.600 1.614 –0.020 1.600 1.618 –0.024 2 Max 2.010 2.006 +0.010 2.010 2.010 +0.006 2.010 2.012 +0.004 2.010 2.020 –0.004 2.010 2.024 –0.008 Min 2.000 2.000 –0.006 2.000 2.004 –0.010 2.000 2.006 –0.012 2.000 2.014 –0.020 2.000 2.018 –0.024 2.5 Max 2.510 2.506 +0.010 2.510 2.510 +0.006 2.510 2.512 +0.004 2.510 2.520 –0.004 2.510 2.524 –0.008 Min 2.500 2.500 –0.006 2.500 2.504 –0.010 2.500 2.506 –0.012 2.500 2.514 –0.020 2.500 2.518 –0.024 3 Max 3.010 3.006 +0.010 3.010 3.010 +0.006 3.010 3.012 +0.004 3.010 3.020 –0.004 3.010 3.024 –0.008 Min 3.000 3.000 –0.006 3.000 3.004 –0.010 3.000 3.006 –0.012 3.000 3.014 –0.020 3.000 3.018 –0.024 4 Max 4.012 4.009 +0.011 4.012 4.016 +0.004 4.012 4.020 0.000 4.012 4.027 –0.007 4.012 4.031 –0.011 Min 4.000 4.001 –0.009 4.000 4.008 –0.016 4.000 4.012 –0.020 4.000 4.019 –0.027 4.000 4.023 –0.031 5 Max 5.012 5.009 +0.011 5.012 5.016 +0.004 5.012 5.020 0.000 5.012 5.027 –0.007 5.012 5.031 –0.011 Min 5.000 5.001 –0.009 5.000 5.008 –0.016 5.000 5.012 –0.020 5.000 5.019 –0.027 5.000 5.023 –0.031 6 Max 6.012 6.009 +0.011 6.012 6.016 +0.004 6.012 6.020 0.000 6.012 6.027 –0.007 6.012 6.031 –0.011 Min 6.000 6.001 –0.009 6.000 6.008 –0.016 6.000 6.012 –0.020 6.000 6.019 –0.027 6.000 6.023 –0.031 8 Max 8.015 8.010 +0.014 8.015 8.019 +0.005 8.015 8.024 0.000 8.015 8.032 –0.008 8.015 8.037 –0.013 Min 8.000 8.001 –0.010 8.000 8.010 –0.019 8.000 8.015 –0.024 8.000 8.023 –0.032 8.000 8.028 –0.037 10 Max 10.015 10.010 +0.014 10.015 10.019 +0.005 10.015 10.024 0.000 10.015 10.032 –0.008 10.015 10.034 –0.013 Min 10.000 10.001 –0.010 10.000 10.010 –0.019 10.000 10.015 –0.024 10.000 10.023 –0.032 10.000 10.028 –0.037 12 Max 12.018 12.012 +0.017 12.018 12.023 +0.006 12.018 12.029 0.000 12.018 12.039 –0.010 12.018 12.044 –0.015 Min 12.000 12.001 –0.012 12.000 12.012 –0.023 12.000 12.018 –0.029 12.000 12.028 –0.039 12.000 12.033 –0.044 16 Max 16.018 16.012 +0.017 16.018 16.023 +0.006 16.018 16.029 0.000 16.018 16.039 –0.010 16.018 16.044 –0.015 Min 16.000 16.001 –0.012 16.000 16.012 –0.023 16.000 16.018 –0.029 16.000 16.028 –0.039 16.000 16.033 –0.044 20 Max 20.021 20.015 +0.019 20.021 20.028 +0.006 20.021 20.035 –0.001 20.021 20.048 –0.014 20.021 20.054 –0.020 Min 20.000 20.002 –0.015 20.000 20.015 –0.028 20.000 20.022 –0.035 20.000 20.035 –0.048 20.000 20.041 –0.054 25 Max 25.021 25.015 +0.019 25.021 25.028 +0.006 25.021 25.035 –0.001 25.021 25.048 –0.014 25.021 25.061 –0.027 Min 25.000 25.002 –0.015 25.000 25.015 –0.028 25.000 25.022 –0.035 25.000 25.035 –0.048 25.000 25.048 –0.061
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