Class I - Loose Fit Tolerance Chart for Holes and Bolts

Tolerances, Engineering Design & Limits & Fits

Related Resources:

Geometric Boundaries II GD&T Reference Book

Class I - Loose Fit Tolerance Chart for Holes and Bolts per McDonald Douglas Design Guide "Machining Tolerances".

Units given in inches

Loose running or sliding fits / tolerances are intended for use where wide commercial tolerances may be necessary, together with an allowance, on the external member.

Class I - Loose 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
.1578
.1558
.1548
.0004
.0030
.188 .1875
.1891
.1871
.1861
.0004
.0030
.213 .2188
.2204
.2184
.2174
.0004
.0030
.250 .2500
.2516
.2496
.2486
.0004
.0030
.281 .2812
.2832
.2805
.2794
.0007
.0038
.312 .3125
.3145
.3118
.3107
.0007
.0038
.344 .3438
.3458
.3431
.3420
.0007
.0038
.375 .3750
.3770
.3743
.3732
.0007
.0038
.406 .4062
.4082
.4055
.4044
.0007
.0038
.438 .4375
.4395
.4368
.4357
.0007
.0038
.469 .4688
.4708
.4681
.4670
.0007
.0038
.500 .5000
.5020
.4993
.4982
.0007
.0038
.562 .5625
.5650
.5615
.5603
.0010
.0047
.625 .6250
.6275
.6240
.6228
.0010
.0047
.688 .6875
.6900
.6865
.6853
.0010
.0047
.750 .7500
.7525
.7490
.7478
.0010
.0047
.812 .8125
.8155
.8113
.8100
.0012
.0055
.875 .8750
.8780
.8738
.8725
.0012
.0055
.938 .9375
.9405
.9363
.9350
.0012
.0055
1.000 1.0000
1.0030
.9988
.9975
.0012
.0055
1.125 1.1250
1.1285
1.1235
1.1218
.0015
.0067
1.250 1.2500
1.2535
1.2485
1.2468
.0015
.0067
1.375 1.3750
1.3785
1.3735
1.3718
.0015
.0067
1.500 1.5000
1.5036
1.4985
1.4968
.0015
.0068

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