Tolerances Used for Standard Metric and
Inch Size Keyways and Square Holes |
| Metric Size Keyways |
| Keyway Size |
Tolerance |
| 2 mm — 6 mm |
+ .001 inches
–0 |
| 8 mm — 12 mm |
+ .002 inches
–0 |
|
 |
| Inch Size Keyways |
| Keyway Size |
Tolerance |
| .0625 — .250 inches |
+ .001 inches
–0 |
| .3125 — .500 inches |
+ .002 inches
–0 |
|
|
| Metric Size Squares |
| Square Size |
Tolerance |
| 2 mm — 12 mm |
+ .001 inches
–0 |
| 13 mm — 22 mm |
+ .002 inches
–0 |
| 24 mm — 26 mm |
+ .003 inches
–0 |
|
|
| Inch Size Squares |
| Square Size |
Tolerance |
| .125 — .500 inches |
+ .001 inches
–0 |
| .5625 — .875 inches |
+ .002 inches
–0 |
| 1.00 — 1.250 inches |
+ .003 inches
–0 |
|
|
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