Upper and lower deviations of shaft m6 for nominal sizes 0–500 mm, per ISO 286-1. Values in mm; "+" means larger than nominal, "-" smaller. Calculate other sizes →
| Nominal size (mm) | Upper deviation | Lower deviation | Tolerance (IT) |
|---|---|---|---|
| 0 ~ 3 | +0.008 | +0.002 | 0.006 |
| >3 ~ 6 | +0.012 | +0.004 | 0.008 |
| >6 ~ 10 | +0.015 | +0.006 | 0.009 |
| >10 ~ 18 | +0.018 | +0.007 | 0.011 |
| >18 ~ 30 | +0.021 | +0.008 | 0.013 |
| >30 ~ 50 | +0.025 | +0.009 | 0.016 |
| >50 ~ 80 | +0.030 | +0.011 | 0.019 |
| >80 ~ 120 | +0.035 | +0.013 | 0.022 |
| >120 ~ 180 | +0.040 | +0.015 | 0.025 |
| >180 ~ 250 | +0.046 | +0.017 | 0.029 |
| >250 ~ 315 | +0.052 | +0.020 | 0.032 |
| >315 ~ 400 | +0.057 | +0.021 | 0.036 |
| >400 ~ 500 | +0.063 | +0.023 | 0.040 |
Each row applies to the whole size range shown. Ranges are "over the first value, up to and including the second".
m6 is an ISO 286 tolerance class. The lowercase letter m is the fundamental deviation (which side of the nominal size the tolerance zone lies on), and the number 6 is the tolerance grade IT6 (how wide the zone is). Transition (on the tight side): Mostly a slight interference. The diameter tolerance of ISO 8734 / DIN 6325 plus-tolerance dowel pins is m6; they are pressed into an H7 hole where the joint is rarely taken apart and must not work loose. Typical processes for IT6: fine grinding, fine turning, fine boring: shafts for ordinary precision fits (g6, h6, k6, m6 dowel pins).
On a drawing or in a specification, Ø6 m6 and 6(+0.012/+0.004) mean the same thing — the second form writes the deviations out, so nobody has to look them up. SFP product specifications always use the second form.
Click "Calc" in the last column to open the calculator, where the written-out form can be copied with one click.
| Size | Upper deviation | Lower deviation | Actual limits (mm) | |
|---|---|---|---|---|
| Ø1 | +0.008 | +0.002 | 1.002 ~ 1.008 | Calc |
| Ø1.5 | +0.008 | +0.002 | 1.502 ~ 1.508 | Calc |
| Ø2 | +0.008 | +0.002 | 2.002 ~ 2.008 | Calc |
| Ø2.5 | +0.008 | +0.002 | 2.502 ~ 2.508 | Calc |
| Ø3 | +0.008 | +0.002 | 3.002 ~ 3.008 | Calc |
| Ø4 | +0.012 | +0.004 | 4.004 ~ 4.012 | Calc |
| Ø5 | +0.012 | +0.004 | 5.004 ~ 5.012 | Calc |
| Ø6 | +0.012 | +0.004 | 6.004 ~ 6.012 | Calc |
| Ø8 | +0.015 | +0.006 | 8.006 ~ 8.015 | Calc |
| Ø10 | +0.015 | +0.006 | 10.006 ~ 10.015 | Calc |
| Ø12 | +0.018 | +0.007 | 12.007 ~ 12.018 | Calc |
| Ø13 | +0.018 | +0.007 | 13.007 ~ 13.018 | Calc |
| Ø16 | +0.018 | +0.007 | 16.007 ~ 16.018 | Calc |
| Ø20 | +0.021 | +0.008 | 20.008 ~ 20.021 | Calc |
| Ø25 | +0.021 | +0.008 | 25.008 ~ 25.021 | Calc |
| Ø30 | +0.021 | +0.008 | 30.008 ~ 30.021 | Calc |
| Ø35 | +0.025 | +0.009 | 35.009 ~ 35.025 | Calc |
| Ø40 | +0.025 | +0.009 | 40.009 ~ 40.025 | Calc |
| Ø50 | +0.025 | +0.009 | 50.009 ~ 50.025 | Calc |
| Ø60 | +0.030 | +0.011 | 60.011 ~ 60.030 | Calc |
| Ø80 | +0.030 | +0.011 | 80.011 ~ 80.030 | Calc |
| Ø100 | +0.035 | +0.013 | 100.013 ~ 100.035 | Calc |
| Fit | Type | Typical use |
|---|---|---|
| H7/m6 | Transition | A transition fit on the tight side, mostly a slight interference. The standard pairing for press-in dowel pins — ISO 8734 / DIN 6325 plus-tolerance pins are m6, used with a reamed H7 hole; for moulds, dies and fixtures that are rarely dismantled and must not work loose. |
The tolerance zones of the classes below lie entirely inside m6 (true for every size range from 0 to 500 mm), so they also satisfy a drawing that calls for m6. Those listed first are closest to m6; price and lead time still depend on material, size and stock.
It depends on the diameter. For Ø6, m6 means the part must measure between 6.004 and 6.012 mm, written 6(+0.012/+0.004). For other diameters see the chart above; every size range is listed.
Letters in lowercase denote a shaft (outside diameter). In uppercase, M6 is a hole tolerance, lying on the opposite side of the nominal size.
Yes. m5 is tighter than m6: at every diameter its limits fall inside the range m6 allows. The precision is simply higher than required, so the price may be a little higher.
Values follow ISO 286-1; the table was cross-checked cell by cell against three independent sources on 2026-08-26 (6,674 cells agree, 0 errors). Coverage: shafts a–z and the corresponding uppercase holes, IT1–IT13, nominal sizes 0–500 mm. cd/ef/fg/za/zb/zc, sizes above 500 mm and grades above IT13 are not included: the tool reports "not found" and never extrapolates. Data sources and verification →