Hot Rolled Round Bar Tolerances
| Specified Size, inches | Permitted Variation, Over, inches | Permitted Variation, Under, inches | Permitted Out-of-Round, inches |
|---|---|---|---|
| Up to 5/16 | 0.005 | 0.005 | 0.008 |
| Over 5/16 up to 7/16 | 0.006 | 0.006 | 0.009 |
| Over 7/16 up to 5/8 | 0.007 | 0.007 | 0.010 |
| Over 5/8 up to 7/8 | 0.008 | 0.008 | 0.012 |
| Over 7/8 up to 1 | 0.009 | 0.009 | 0.013 |
| Over 1 up to 1-1/8 | 0.010 | 0.010 | 0.015 |
| Over 1-1/8 up to 1-1/4 | 0.011 | 0.011 | 0.016 |
| Over 1-1/4 up to 1-3/8 | 0.012 | 0.012 | 0.018 |
| Over 1-3/8 up to 1-1/2 | 0.014 | 0.014 | 0.021 |
| Over 1-1/2 up to 2 | 1/64 | 1/64 | 0.023 |
| Over 2 up to 2-1/2 | 1/32 | 0 | 0.023 |
| Over 2-1/2 up to 3-1/2 | 3/64 | 0 | 0.035 |
| Over 3-1/2 up to 4-1/2 | 1/16 | 0 | 0.046 |
| Over 4-1/2 up to 5-1/2 | 5/64 | 0 | 0.058 |
| Over 5-1/2 up to 6-1/2 | 1/8 | 0 | 0.070 |
| Over 6-1/2 up to 8-1/4 | 5/32 | 0 | 0.085 |
| Over 8-1/4 up to 9-1/2 | 3/16 | 0 | 0.100 |
| Over 9-1/2 up to 10 | 1/4 | 0 | 0.120 |