Class III Medium Fit Tolerance Chart for Holes and Bolts

Tolerances, Engineering Design & Limits & Fits

Related Resources:

• Shaft - Hole Class Grade Tolerance Table
• Class I - Loose Fit Tolerance Table Chart
• Class II Free Fit Tolerance Chart Table
• Class IV Transition Tolerance Chart Table
• Class V Locational Interference Tolerance Table Chart

Class III Medium Fit Tolerance Chart for Holes and Bolts per McDonald Douglas Design Guide "Machining Tolerances".

Units given in inches

Medium running fits tolerances are intended for higher running speeds, or heavy journal pressures, or both.

Class III Medium Fit Tolerance Chart for Holes and Bolts

Basic Diameter	Hole Diameter	Shaft Diameter	Clearance Maximum Minimum
.125	.1250 .1258	.1248 .1242	.0002 .0016
.156	.1562 .1570	.1560 .1554	.0002 .0016
.188	.1875 .1893	.1873 .1867	.0002 .0016
.213	.2188 .2196	.2186 .2180	.0002 .0016
.250	.2500 .2508	.2498 .2492	.0002 .0016
.281	.2812 .2820	.2808 .2800	.0004 .0020
.312	.3125 .3133	.3121 .3113	.0004 .0020
.344	.3438 .3446	.3434 .3425	.0004 .0020
.375	.3750 .3758	.3746 .3738	.0004 .0020
.406	.4062 .4070	.4058 .4050	.0004 .0020
.438	.4375 .4383	.4371 .4363	.0004 .0020
.469	.4688 .4796	.4684 .4675	.0004 .0020
.500	.5000 .5008	.4996 .4988	.0004 .0020
.562	.5625 .5634	.5619 .5610	.0006 .0024
.625	.6250 .6259	.6244 .6235	.0006 .0024
.688	.6875 .6884	.6869 .6860	.0006 .0024
.750	.7500 .7509	.7494 .7485	.0006 .0024
.812	.8125 .8134	.8117 .8107	.0008 .0027
.875	.8750 .8759	.8742 .8732	.0008 .0027
.938	.9375 .9384	.9367 .9357	.0008 .0027
1.000	1.0000 1.0009	.9992 .9982	.0008 .0027
1.125	1.1250 1.1260	1.1240 1.1229	.0010 .0031
1.250	1.2500 1.2510	1.2490 1.2479	.0010 .0031
1.375	1.3750 1.3760	1.3740 1.3724	.0010 .0031
1.500	1.5000 1.5010	1.4990 1.4979	.0010 .0031
1.625	1.6250 1.6260	1.6237 1.6225	.0013 .0035
1.750	1.7500 1.7510	1.7487 1.7475	.0013 .0035
1.875	1.8750 1.8760	1.8737 1.8725	.0013 .0035
2.000	2.0000 2.0010	1.9987 1.9975	.0013 .0035
2.250	2.2500 2.2511	2.2485 2.2472	.0015 .0039
2.500	2.5000 2.5011	2.4985 2.4872	.0015 .0039
2.750	2.7500 2.7511	2.7483 2.7469	.0017 .0042
3.000	3.0000 3.0011	2.9983 2.9969	.0017 .0042
3.250	3.2500 3.2512	3.2480 3.2464	.0020 .0048
3.500	3.5000 3.5012	3.4980 3.4964	.0020 .0048
3.750	3.7500 3.7512	3.7480 3.7464	.0020 .0048
4.000	4.0000 4.0012	3.9960 3.9964	.0020 .0048

Related Resources:

• Gage Tolerance Calculator ASME B89.1.5 Pin and Ring Gauges
• ISO Tolerances For Fasteners
• Gauge Blocks Tolerances Specifications Table DIN 861
• General Tolerances Shaft - Holes Fits
• GD&T Geometric Dimensioning Tolerancing Basics Training
• GD&T Geometric Dimensioning Tolerancing Intermediate Training
• GDT ASME Y14.5-2009 Applications Training
• G&T Geometric Tolerancing ISO 1101 Training
• Online GD&T Fundamentals Training