ISO Tolerances Chart

Dimensional Tolerance Zones for External Fasteners (mm):

Nominal Size Range		Permissible Deviations in mm
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

Dimensional Tolerance Zones for Internal Fasteners (mm) :

Nominal Size Range (mm)		Permissible Deviations – Internal Fasteners
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