ISO Tolerances Chart

Dimensional Tolerance Zones for Internal Fasteners (mm):

Nominal Size Range (mm)	Standard Tolerance Values [mm]							Limits for Internal Dimensions [mm]
Nominal Size Range (mm)	IT11	IT12	IT13	IT14	IT15	IT16	IT17	D12	F8	H6	H7	H8	H9	H10	H11	H12	H13	H14	H15
up to 3	0.06	0.10	0.14	0.25	0.40	0.63	1.00	+0.12 +0.02	+0.02 +0.006	+0.006 0	+0.01 0	+0.014 0	+0.025 0	+0.04 0	+0.06 0	+0.10 0	+0.14 0	+0.25 0	+0.40 0
over 3 – 6	0.075	0.12	0.18	0.30	0.48	0.75	1.20	+0.15 +0.03	+0.028 +0.01	+0.008 0	+0.012 0	+0.018 0	+0.030 0	+0.048 0	+0.075 0	+0.12 0	+0.18 0	+0.30 0	+0.48 0
over 6 – 10	0.09	0.15	0.22	0.36	0.58	0.90	1.40	+0.18 +0.04	+0.034 +0.012	+0.009 0	+0.015 0	+0.022 0	+0.036 0	+0.058 0	+0.090 0	+0.15 0	+0.22 0	+0.36 0	+0.58 0
over 10 – 18	0.11	0.18	0.27	0.43	0.70	1.10	1.80	+0.043 +0.05	+0.043 +0.016	+0.011 0	+0.018 0	+0.027 0	+0.043 0	+0.070 0	+0.11 0	+0.18 0	+0.27 0	+0.43 0	+0.70 0
over 18 – 30	0.13	0.21	0.32	0.52	0.84	1.30	2.10	+0.052 +0.06	+0.052 +0.020	+0.013 0	+0.021 0	+0.032 0	+0.052 0	+0.084 0	+0.13 0	+0.21 0	+0.32 0	+0.52 0	+0.84 0
over 30 – 50	0.16	0.25	0.39	0.62	1.00	1.60	2.50	+0.33 +0.08	+0.004 +0.025	+0.016 0	+0.025 0	+0.039 0	+0.062 0	+0.10 0	+0.16 0	+0.25 0	+0.39 0	+0.62 0	+1.00 0
over 50 – 80	0.19	0.30	0.46	0.74	1.20	1.90	3.00	+0.40 +0.10	+0.076 +0.03	+0.019 0	+0.030 0	+0.046 0	+0.074 0	+0.12 0	+0.19 0	+0.30 0	+0.46 0	+0.74 0	+1.20 0
over 80 – 120	0.22	0.35	0.54	0.87	1.40	2.20	3.60	+0.46 +0.12	+0.092 +0.036	+0.023 0	+0.036 0	+0.054 0	+0.087 0	+0.14 0	+0.22 0	+0.35 0	+0.54 0	+0.87 0	+1.40 0
over 120 – 180	0.25	0.40	0.63	1.00	1.60	2.50	4.00	+0.54 +0.15	+0.106 +0.043	+0.027 0	+0.043 0	+0.063 0	+0.10 0	+0.16 0	+0.25 0	+0.40 0	+0.63 0	+1.00 0	+1.60 0
over 180 – 250	0.29	0.46	0.74	1.20	1.90	3.00	4.60	+0.63 +0.17	+0.122 +0.052	+0.029 0	+0.046 0	+0.072 0	+0.1115 0	+0.185 0	+0.29 0	+0.46 0	+0.72 0	+1.15 0	+1.85 0
over 250 – 315	0.32	0.52	0.89	1.30	2.10	3.20	5.20	+0.72 +0.20	+0.137 +0.057	+0.032 0	+0.052 0	+0.082 0	+0.13 0	+0.21 0	+0.32 0	+0.52 0	+0.81 0	+1.30 0	+2.10 0
over 315 – 400	0.36	0.57	0.89	1.40	2.30	3.60	5.70	+0.78 +0.21	+0.151 +0.062	+0.036 0	+0.057 0	+0.089 0	+0.14 0	+0.23 0	+0.36 0	+0.57 0	+0.89 0	+1.40 0	+2.30 0
over 400 – 500	0.40	0.63	0.97	1.55	2.50	4.00	6.30	+0.86 +0.23	+0.165 +0.068	+0.04 0	+0.063 0	+0.097 0	+0.155 0	+0.25 0	+0.40 0	+0.63 0	+0.97 0	+1.55 0	+2.50 0

Dimensional Tolerance Zones for External Fasteners (mm):

Nominal Size Range (mm)	Tolerance fields for external dimensions [mm]
Nominal Size Range (mm)	d12	f9	h6	h7	h8	h9	h10	h11	h12	h13	h14	h15	h16	h17	js14	js15	js16	js17	m6
up to 3	-0.02 -0.12	-0.006 -0.031	0 -0.006	0 -0.01	0 -0.014	0 -0.025	0 -0.04	0 -0.06	0 -0.10	0 -0.14	0 -0.25	0 -0.40	0 -0.60	0 -1.00	±0.125	±0.20	±0.30	±0.50	+0.008 +0.002
over 3 - 6	-0.03 -0.15	-0.01 -0.04	0 -0.008	0 -0.012	0 -0.018	0 -0.03	0 -0.048	0 -0.075	0 -0.12	0 -0.18	0 -0.30	0 -0.48	0 -0.75	0 -1.20	±0.15	±0.24	±0.375	±0.60	+0.012 +0.004
over 6 - 10	-0.04 -0.19	-0.013 -0.049	0 -0.009	0 -0.015	0 -0.022	0 -0.036	0 -0.058	0 -0.09	0 -0.15	0 -0.22	0 -0.36	0 -0.58	0 -0.90	0 -1.50	±0.18	±0.29	±0.45	±0.75	+0.015 +0.006
over 18 - 30	-0.065 -0.27	-0.021 -0.07	0 -0.013	0 -0.021	0 -0.032	0 -0.052	0 -0.083	0 -0.13	0 -0.21	0 -0.32	0 -0.52	0 -0.85	0 -1.3	0 -2.1	±0.26	±0.42	±0.65	±1.05	+0.021 +0.008
over 30 - 50	-0.08 -0.32	-0.025 -0.089	0 -0.016	0 -0.025	0 -0.039	0 -0.062	0 -0.1	0 -0.15	0 -0.25	0 -0.36	0 -0.58	0 -0.93	0 -1.3	0 -2.3	±0.3	±0.48	±0.75	±1.2	+0.025 +0.009
over 50 - 80	-0.1 -0.4	-0.03 -0.104	0 -0.019	0 -0.03	0 -0.046	0 -0.074	0 -0.12	0 -0.19	0 -0.3	0 -0.46	0 -0.74	0 -1.2	0 -1.9	0 -3.0	±0.37	±0.6	±0.95	±1.5	+0.03 +0.011
over 80 - 120	-0.12 -0.47	-0.036 -0.123	0 -0.022	0 -0.035	0 -0.054	0 -0.087	0 -0.14	0 -0.22	0 -0.35	0 -0.54	0 -0.87	0 -1.4	0 -2.2	0 -3.5	±0.435	±0.70	±1.0	±1.75	+0.035 +0.013
over 120 - 180	-0.145 -0.545	-0.043 -0.143	0 -0.025	0 -0.004	0 -0.063	0 -0.1	0 -0.16	0 -0.25	0 -0.40	0 -0.63	0 -1.0	0 -1.6	0 -2.5	0 -4.0	±0.5	±0.8	±1.25	±2.0	+0.04 +0.015
over 180 - 250	-0.17 -0.63	-0.05 -0.165	0 -0.029	0 -0.046	0 -0.072	0 -0.115	0 -0.185	0 -0.29	0 -0.46	0 -0.72	0 -1.15	0 -1.85	0 -2.9	0 -4.6	±0.575	±0.925	±1.45	±2.3	+0.046 +0.017
over 250 - 315	-0.19 -0.71	-0.056 -0.185	0 -0.032	0 -0.052	0 -0.081	0 -0.13	0 -0.21	0 -0.32	0 -0.52	0 -0.81	0 -1.3	0 -2.1	0 -3.2	0 -5.2	±0.65	±1.05	±1.06	±2.6	+0.052 +0.02
over 315 - 400	-0.21 -0.78	-0.062 -0.202	0 -0.036	0 -0.057	0 -0.089	0 -0.14	0 -0.23	0 -0.36	0 -0.57	0 -0.89	0 -1.4	0 -2.3	0 -3.6	0 -5.7	±0.7	±1.15	±1.8	±2.85	+0.057 +0.021
over 400 - 500	-0.23 -0.66	-0.068 -0.223	0 -0.04	0 -0.063	0 -0.097	0 -0.155	0 -0.25	0 -0.4	0 -0.63	0 -0.97	0 -1.55	0 -2.5	0 -4.0	0 -6.3	±0.7755	±1.25	±2.0	±3.5	+0.063 +0.0233