Class II Free Fit Tolerance Chart for Holes and Bolts

Tolerances, Engineering Design & Limits & Fits

Related Resources:

Geometric Boundaries II GD&T Reference Book

Class II Fit Free Fit Tolerance Chart for Holes and Bolts per ANSI 4.1

Free running fits - tolerances are intended for use where accuracy is not essential, or where large temperature variations are likely to be encountered, or under both these conditions.

Class II Fit Free Fit Tolerance Chart for Holes and Bolts
Basic
Diameter
Hole
Diameter
Shaft
Diameter
Clearance
Maximum
Minimum
.125 .1250
.1258
.1246
.1236
.0004
.0022
.156 .1562
.1570
.1558
.1548
.0004
.0022
.188 .1875
.1893
.1871
.1861
.0004
.0022
.213 .2188
.2196
.2184
.2174
.0004
.0022
.250 .2500
.2508
.2496
.2486
.0004
.0022
.281 .2812
.2822
.2805
.2794
.0007
.0028
.312 .3125
.3135
.3118
.3107
.0007
.0028
.344 .3438
.3448
.3431
.3420
.0007
.0028
.375 .3750
.3760
.3743
.3732
.0007
.0028
.406 .4062
.4072
.4055
.4044
.0007
.0028
.438 .4375
.4385
.4368
.4357
.0007
.0028
.469 .4688
.4698
.4681
.4670
.0007
.0028
.500 .5000
.5010
.4993
.4982
.0007
.0028
.562 .5625
.5637
.5615
.5603
.0010
.0034
.625 .6250
.6262
.6240
.6228
.0010
.0034
.688 .6875
.6887
.6865
.6853
.0010
.0034
.750 .7500
.7512
.7490
.7478
.0010
.0034
.812 .8125
.8140
.8113
.8100
.0012
.0040
.875 .8750
.8765
.8738
.8725
.0012
.0040
.938 .9375
.9390
.9363
.9350
.0012
.0040
1.000 1.0000
1.0015
.9988
.9975
.0012
.0040
1.125 1.1250
1.1267
1.1235
1.1218
.0015
.0049
1.250 1.2500
1.2517
1.2485
1.2468
.0015
.0049
1.375 1.3750
1.3787
1.3735
1.3718
.0015
.0049
1.500 1.5000
1.5017
1.4985
1.4968
.0015
.0049
1.625 1.6250
1.6268
1.6231
1.6212
.0019
.0057
1.750 1.7500
1.7519
1.7481
1.7462
.0019
.0057
1.875 1.8750
1.8769
1.8731
1.8712
.0019
.0057
2.000 2.0000
2.0019
1.9981
1.9962
.0019
.0057
2.250 2.2500
2.2520
2.2476
2.2456
.0024
.0064
2.500 2.5000
2.5020
2.4976
2.4856
.0024
.0064
2.750 2.7500
2.7522
2.7475
2.7453
.0025
.0069
3.000 3.0000
3.0022
2.9975
2.9953
.0025
.0069
3.250 3.2500
3.2524
3.2470
3.2446
.0030
.0078
3.500 3.5000
3.5024
3.4970
3.4946
.0030
.0078
3.750 3.7500
3.7524
2.7470
3.7440
.0030
.0078
4.000 4.0000
4.0024
3.9970
3.9946
.0030
.0078

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