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| Nominal Size or Basic product Diameter | Body Diameter, E | Width Across Flats, F | Width Across Corners, G | Head Height, H | Mid- Height H | Radius of Fillet, R | Maximum Unthreaded Length, S | Thread Length for Bolt Lengths, LT | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 6 in. & Shorter | Over 6 in. | ||||||||||||||
| Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Ref. | Max. | Min. | Nom. | Nom. | |||
| 3/8 | 0.3750 | 0.388 | 0.360 | 0.562 | 0.544 | 0.795 | 0.747 | 0.317 | 0.277 | 0.250 | 0.03 | 0.01 | 0.250 | 1.000 | 1.250 |
| 1/2 | 0.5000 | 0.515 | 0.482 | 0.750 | 0.725 | 1.061 | 0.995 | 0.411 | 0.371 | 0.328 | 0.03 | 0.01 | 0.312 | 1.250 | 1.500 |
| 5/8 | 0.6250 | 0.642 | 0.605 | 0.938 | 0.906 | 1.326 | 1.244 | 0.520 | 0.480 | 0.422 | 0.06 | 0.02 | 0.344 | 1.500 | 1.750 |
| 3/4 | 0.7500 | 0.768 | 0.729 | 1.125 | 1.088 | 1.591 | 1.494 | 0.614 | 0.574 | 0.500 | 0.06 | 0.02 | 0.406 | 1.750 | 2.000 |
| 7/8 | 0.8750 | 0.895 | 0.852 | 1.312 | 1.269 | 1.856 | 1.742 | 0.723 | 0.683 | 0.594 | 0.06 | 0.02 | 0.438 | 2.000 | 2.250 |
| 1 | 1.0000 | 1.022 | 0.976 | 1.500 | 1.450 | 2.121 | 1.991 | 0.801 | 0.761 | 0.656 | 0.09 | 0.03 | 0.500 | 2.250 | 2.500 |