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 30 Max 30.021 30.015 +0.019 30.021 30.028 +0.006 30.021 30.035 –0.001 30.021 30.048 –0.014 30.021 30.061 –0.027 Min 30.000 30.002 –0.015 30.000 30.015 –0.028 30.000 30.022 –0.035 30.000 30.035 –0.048 30.000 30.048 –0.061 40 Max 40.025 40.018 +0.023 40.025 40.033 +0.008 40.025 40.042 –0.001 40.025 40.059 –0.018 40.025 40.076 –0.035 Min 40.000 40.002 –0.018 40.000 40.017 –0.033 40.000 40.026 –0.042 40.000 40.043 –0.059 40.000 40.060 –0.076 50 Max 50.025 50.018 +0.023 50.025 50.033 +0.008 50.025 50.042 –0.001 50.025 50.059 –0.018 50.025 50.086 –0.045 Min 50.000 50.002 –0.018 50.000 50.017 –0.033 50.000 50.026 –0.042 50.000 50.043 –0.059 50.000 50.070 –0.086 60 Max 60.030 60.021 +0.028 60.030 60.039 +0.010 60.030 60.051 –0.002 60.030 60.072 –0.023 60.030 60.106 –0.057 Min 60.000 60.002 –0.021 60.000 60.020 –0.039 60.000 60.032 –0.051 60.000 60.053 –0.072 60.000 60.087 –0.106 80 Max 80.030 80.021 +0.028 80.030 80.039 +0.010 80.030 80.051 –0.002 80.030 80.078 –0.029 80.030 80.121 –0.072 Min 80.000 80.002 –0.021 80.000 80.020 –0.039 80.000 80.032 –0.051 80.000 80.059 –0.078 80.000 80.102 –0.121 100 Max 100.035 100.025 +0.032 100.035 100.045 +0.012 100.035 100.059 –0.002 100.035 100.093 –0.036 100.035 100.146 –0.089 Min 100.000 100.003 –0.025 100.000 100.023 –0.045 100.000 100.037 –0.059 100.000 100.071 –0.093 100.000 100.124 –0.146 120 Max 120.035 120.025 +0.032 120.035 120.045 +0.012 120.035 120.059 –0.002 120.035 120.101 –0.044 120.035 120.166 –0.109 Min 120.000 120.003 –0.025 120.000 120.023 –0.045 120.000 120.037 –0.059 120.000 120.079 –0.101 120.000 120.144 –0.166 160 Max 160.040 160.028 +0.037 160.040 160.052 +0.013 160.040 160.068 –0.003 160.040 160.125 –0.060 160.040 160.215 –0.150 Min 160.000 160.003 –0.028 160.000 160.027 –0.052 160.000 160.043 –0.068 160.000 160.100 –0.125 160.000 160.190 –0.215 200 Max 200.046 200.033 +0.042 200.046 200.060 +0.015 200.046 200.079 –0.004 200.046 200.151 –0.076 200.046 200.265 –0.190 Min 200.000 200.004 –0.033 200.000 200.031 –0.060 200.000 200.050 –0.079 200.000 200.122 –0.151 200.000 200.236 –0.265 250 Max 250.046 250.033 +0.042 250.046 250.060 +0.015 250.046 250.079 –0.004 250.046 250.169 –0.094 250.046 250.313 –0.238 Min 250.000 250.004 –0.033 250.000 250.031 –0.060 250.000 250.050 –0.079 250.000 250.140 –0.169 250.000 250.284 –0.313 300 Max 300.052 300.036 +0.048 300.052 300.066 +0.018 300.052 300.088 –0.004 300.052 300.202 –0.118 300.052 300.382 –0.298 Min 300.000 300.004 –0.036 300.000 300.034 –0.066 300.000 300.056 –0.088 300.000 300.170 –0.202 300.000 300.350 –0.382 400 Max 400.057 400.040 +0.053 400.057 400.073 +0.020 400.057 400.098 –0.005 400.057 400.244 –0.151 400.057 400.471 –0.378 Min 400.000 400.004 –0.040 400.000 400.037 –0.073 400.000 400.062 –0.098 400.000 400.208 –0.244 400.000 400.435 –0.471 500 Max 500.063 500.045 +0.058 500.063 500.080 +0.023 500.063 500.108 –0.005 500.063 500.292 –0.189 500.063 500.580 –0.477 Min 500.000 500.005 –0.045 500.000 500.040 –0.080 500.000 500.068 –0.108 500.000 500.252 –0.292 500.000 500.540 –0.580 a The sizes shown are first-choice basic sizes (see Table 1, page 688 ). Preferred fits for other sizes can be calculated from data given in ANSI/ASME B4.2-1978 (R2009). b A plus sign indicates clearance; a minus sign indicates interference. All dimensions are in millimeters. Table3. (Continued) American National Standard Preferred Hole Basis Metric Transition and Interference Fits ANSI/ASME B4.2-1978 (R2009)
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