Stainless Steel - ISO Dimensional Tolerances for Bar

Nominal Bar Size (mm)	Tolerance Number
Nominal Bar Size (mm)	01	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16
up to 3	0.3	0.5	0.8	1.2	2	3	4	6	10	14	25	40	60	100	140	250	400	600
over 3 to 6	0.4	0.6	1	1.5	2.5	4	5	8	12	18	30	48	75	120	180	300	480	750
over 6 to10	0.4	0.6	1	1.5	2.5	4	6	9	15	22	36	58	90	150	220	360	580	900
over 10 to 18	0.5	0.8	1.2	2	3	5	8	11	18	27	43	70	110	180	270	430	700	1100
over 18 to 30	0.6	1	1.5	2.5	4	6	9	13	21	33	52	84	130	210	330	520	840	1300
over 30 to 50	0.6	1	1.5	2.5	4	7	11	16	25	39	62	100	160	250	390	620	1000	1600
over 50 to 80	0.8	1.2	2	3	5	8	13	19	30	46	74	120	190	300	460	740	1200	1900
over 80 to 120	1	1.5	2.5	4	6	10	15	22	35	54	87	140	220	350	540	870	1400	2200
over 120 to 180	1.2	2	3.5	5	8	12	18	25	40	63	100	160	250	400	630	1000	1600	2500
over 180 to 250	2	3	4.5	7	10	14	20	29	46	72	115	185	290	460	720	1150	1850	2900
over 250 to 315	2.5	4	6	8	12	16	23	32	52	81	130	210	320	520	810	1300	2100	3200
over 315 to 400	3	5	7	9	13	18	25	36	57	89	140	230	360	570	890	1400	2300	3600
over 400 to 500	4	6	8	10	15	20	27	40	63	97	155	250	400	630	970	1550	2500	4000