Nuts
Square Plain Nuts
Dimensions of Square Nuts
| Nominal Size or Basic Major Diameter of Thread |
F | G | Thickness | Bearing Surface, |
|||||
| Width Across Flats | Width Across Corners | ||||||||
| Basic | Max | Min | Max | Min | Basic | Max | Min | ||
| 1/4 (0.2500) | 7/16 | 0.438 | 0.425 | 0.619 | 0.554 | 7/32 | 0.235 | 0.203 | 0.011 |
| 5/16 (0.3125) | 9/16 | 0.562 | 0.547 | 0.795 | 0.721 | 17/64 | 0.283 | 0.249 | 0.015 |
| 3/8 (0.3750) | 5/8 | 0.625 | 0.606 | 0.884 | 0.802 | 21/64 | 0.346 | 0.310 | 0.016 |
| 7/16 (0.4375) | 3/4 | 0.750 | 0.728 | 1.061 | 0.970 | 3/8 | 0.394 | 0.356 | 0.019 |
| 1/2 (0.5000) | 13/16 | 0.812 | 0.788 | 1.149 | 1.052 | 7/16 | 0.458 | 0.418 | 0.022 |
| 5/8 (0.6250) | 1 | 1.000 | 0.969 | 1.414 | 1.300 | 35/64 | 0.569 | 0.525 | 0.026 |
| 3/4 (0.7500) | 1-1/8 | 1.125 | 1.088 | 1.591 | 1.464 | 21/32 | 0.680 | 0.632 | 0.029 |
| 7/8 (0.8750) | 1-5/16 | 1.312 | 1.269 | 1.856 | 1.712 | 49/64 | 0.792 | 0.740 | 0.034 |
| 1 (1.0000) | 1-1/2 | 1.500 | 1.450 | 2.121 | 1.961 | 7/8 | 0.903 | 0.847 | 0.039 |
| 1-1/8 (1 .1250) | 1-11/16 | 1.688 | 1.631 | 2.386 | 2.209 | 1 | 1.030 | 0.970 | 0.029 |
| 1-1/4 (1.2500) | 1-7/8 | 1.875 | 1.812 | 2.652 | 2.458 | 1-3/32 | 1.126 | 1.062 | 0.032 |
| 1-3/8 (1 .3750) | 2-1/16 | 2.062 | 1.994 | 2.917 | 2.708 | 1-13/64 | 1.237 | 1.169 | 0.035 |
| 1-1/2 (1.5000) | 2-1/4 | 2.250 | 2.175 | 3.182 | 2.956 | 1-5/16 | 1.348 | 1.276 | 0.039 |
