ISO Tolerances For Bolt Fastener and Holes Table Chart ISO 286

Mechanical Tolerance Standards Menu

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

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

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