H10 tolerance (hole, IT10)
Hole tolerance class H10 per ISO 286-1:2010: fundamental deviation EI = 0, grade IT10 (40 µm at ≤ 3 mm to 250 µm at 400–500 mm). For an exact size, open the calculator with H10 selected.
- Type
- Hole
- Grade
- IT10
- Tolerance
- 40 … 250 µm
- Fund. deviation
- EI = 0
H10 limits by size range
| Size (mm) | Upper (µm) | Lower (µm) | Ø max (mm) | Ø min (mm) | Upper (mm) | Lower (mm) | Dev. (in) |
|---|---|---|---|---|---|---|---|
| ≤ 3 | +40 | 0 | 3.040 | 3.000 | +0.040 | 0 | +0.00157 / 0 |
| 3 – 6 | +48 | 0 | 6.048 | 6.000 | +0.048 | 0 | +0.00189 / 0 |
| 6 – 10 | +58 | 0 | 10.058 | 10.000 | +0.058 | 0 | +0.00228 / 0 |
| 10 – 14 | +70 | 0 | 14.070 | 14.000 | +0.070 | 0 | +0.00276 / 0 |
| 14 – 18 | +70 | 0 | 18.070 | 18.000 | +0.070 | 0 | +0.00276 / 0 |
| 18 – 24 | +84 | 0 | 24.084 | 24.000 | +0.084 | 0 | +0.00331 / 0 |
| 24 – 30 | +84 | 0 | 30.084 | 30.000 | +0.084 | 0 | +0.00331 / 0 |
| 30 – 40 | +100 | 0 | 40.100 | 40.000 | +0.100 | 0 | +0.00394 / 0 |
| 40 – 50 | +100 | 0 | 50.100 | 50.000 | +0.100 | 0 | +0.00394 / 0 |
| 50 – 65 | +120 | 0 | 65.120 | 65.000 | +0.120 | 0 | +0.00472 / 0 |
| 65 – 80 | +120 | 0 | 80.120 | 80.000 | +0.120 | 0 | +0.00472 / 0 |
| 80 – 100 | +140 | 0 | 100.140 | 100.000 | +0.140 | 0 | +0.00551 / 0 |
| 100 – 120 | +140 | 0 | 120.140 | 120.000 | +0.140 | 0 | +0.00551 / 0 |
| 120 – 140 | +160 | 0 | 140.160 | 140.000 | +0.160 | 0 | +0.00630 / 0 |
| 140 – 160 | +160 | 0 | 160.160 | 160.000 | +0.160 | 0 | +0.00630 / 0 |
| 160 – 180 | +160 | 0 | 180.160 | 180.000 | +0.160 | 0 | +0.00630 / 0 |
| 180 – 200 | +185 | 0 | 200.185 | 200.000 | +0.185 | 0 | +0.00728 / 0 |
| 200 – 225 | +185 | 0 | 225.185 | 225.000 | +0.185 | 0 | +0.00728 / 0 |
| 225 – 250 | +185 | 0 | 250.185 | 250.000 | +0.185 | 0 | +0.00728 / 0 |
| 250 – 280 | +210 | 0 | 280.210 | 280.000 | +0.210 | 0 | +0.00827 / 0 |
| 280 – 315 | +210 | 0 | 315.210 | 315.000 | +0.210 | 0 | +0.00827 / 0 |
| 315 – 355 | +230 | 0 | 355.230 | 355.000 | +0.230 | 0 | +0.00906 / 0 |
| 355 – 400 | +230 | 0 | 400.230 | 400.000 | +0.230 | 0 | +0.00906 / 0 |
| 400 – 450 | +250 | 0 | 450.250 | 450.000 | +0.250 | 0 | +0.00984 / 0 |
| 450 – 500 | +250 | 0 | 500.250 | 500.000 | +0.250 | 0 | +0.00984 / 0 |
Deviations at the upper end of each range (Ø columns use that size); use the calculator for the exact size. — : not defined by ISO 286 for that size. Upper/Lower (mm) and inch columns are shown on wider screens.
About H10
H10 denotes a hole tolerance zone with zero line deviation in the ISO 286 system.
At Ø25 mm H10 is +0.084 / 0 mm, i.e. 25.000 to 25.084 mm.
How the limits are calculated
H10 uses grade IT10 (a standard tolerance of 84 µm at 18–30 mm). Fundamental deviation: EI = 0: the tolerance zone sits entirely above the nominal size, and IT10 sets its width. See the fundamental deviation table for every letter. Values per ISO 286-1:2010.