ISO Tolerances For Bolt Fastener and Holes Table Chart ISO 286

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The following ISO Tolerance Chart for bolts and holes per ISO 286. These size charts do not compensate position or other GD&T location tolerances.

Related Mechanical Tolerance Design Data

• Preferred Tolerance Grade Zones ISO 286 ****
• International Tolerance Grades

For more exhaustive fastener tolerance data see:
ISO 286 Table Shaft Tolerances Calculator

Size		Tolerance Zone in mm (Bolt - External Features)
over	to	m6	h6	h8	h10	h11	h13	h14	h15	h16
0	1	+0.002 +0.008	0 -0.006	0 -0.014	0 -0.040	0 -0.060	0 -0.14
1	3	+0.002 +0.008	0 -0.006	0 -0.014	0 -0.040	0 -0.060	0 -0.14	0 -0.25	0 -0.40	0 -0.60
3	6	+0.004 +0.012	0 -0.008	0 -0.018	0 -0.048	0 -0.075	0 -0.18	0 -0.30	0 -0.48	0 -0.75
6	10	+0.006 +0.015	0 -0.009	0 -0.022	0 -0.058	0 -0.090	0 -0.22	0 -0.36	0 -0.58	0 -0.90
10	18	+0.007 +0.018	0 -0.011	0 -0.027	0 -0.070	0 -0.110	0 -0.27	0 -0.43	0 -0.70	0 -1.10
18	30	+0.008 +0.021	0 -0.030	0 -0.033	0 -0.084	0 -0.130	0 -0.33	0 -0.52	0 -0.84	0 -1.30
30	50						0 -0.39	0 -0.62	0 -1.00	0 -1.60
50	80						0 -0.46	0 -0.74	0 -1.20	0 -1.90
80	120						0 -0.54	0 -0.87	0 -1.40	0 -2.20

 

Size		Tolerance Zone in mm (Bolt - External Features)
over	to	js14	js15	js16	js17
1	3	+0.125	+0.20	+0.30	+0.50
3	6	+0.15	+0.24	+0.375	+0.60
6	10	+0.18	+0.29	+0.45	+0.75
10	18	+0.215	+0.35	+0.55	+0.90
18	30	+0.26	+0.42	+0.65	+1.05
30	50	+0.31	+0.50	+0.80	+1.25
50	80	+0.37	+0.60	+0.95	+1.50
80	120	+0.435	+0.70	+1.10	+1.75
120	180	+0.50	+0.80	+1.25	+2.00
180	250	+0.575	+0.925	+1.45	+2.30
250	315	+0.65	+1.05	+1.60	+2.60
315	400	+0.70	+1.15	+1.80	+2.85
400	500	+0.775	+1.25	+2.00	+3.15

General Tolerance Zones for Hole (Internal) features
For more exhaustive fastener toleranc data see:
ISO 286 Table Hole Tolerances Calculator

Size		Tolerance Zone in mm (Internal Hole Features)
over	to	H7	H8	H9	H11	H13	H14
0	1	+0.010 0	+0.014 0	+0.025 0	+0.060 0	+0.14 0
1	3	+0.010 0	+0.014 0	+0.025 0	+0.060 0	+0.14 0	+0.25 0
3	6	+0.012 0	+0.018 0	+0.030 0	+0.075 0	+0.18 0	+0.30 0
6	10	+0.015 0	+0.022 0	+0.036 0	+0.090 0	+0.22 0	+0.36 0
10	18	+0.018 0	+0.027 0	+0.043 0	+0.110 0	+0.27 0	+0.43 0
18	30	+0.021 0	+0.033 0	+0.052 0	+0.130 0	+0.33 0	+0.52 0
30	50					+0.39 0	+0.62 0
50	80					+0.46 0	+0.74 0
80	120					+0.54 0	+0.87 0

Related Resources:

• Preferred Tolerance Limits Fits ANSI B4.1
• International Tolerances Grades
• General ISO Geometrical Tolerances Per. ISO 2768
• Gage Tolerance Calculator ASME B89.1.5 Pin and Ring Gauges
• 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