ISO Tolerances For Metric Fasteners
Nominal Dimension Tolerance Zone in mm (External Measurements)
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
Nominal Dimension Tolerance Zone in mm (External Measurements)
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
Nominal Dimension Tolerance Zone in mm (Internal Measurements)
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

***All information is strictly informative***