Inch series · technical reference
Finished Hex Nut Dimensions
Finished hex nut envelope dimensions for common inch UNC sizes. This is not a chart for thin, heavy-hex, flange, prevailing-torque or metric nuts.
Source: ASME B18.2.2.
CAD ORTHOGRAPHIC REFERENCEASME B18.2.2.4A · INCH SERIES REFERENCE
Reference size shown: 1/4-20 UNC. The drawing identifies dimension locations only. Use the table for nominal data and confirm the exact product configuration before ordering.
| Nominal size | TPI | s — WAF basic | m — height basic | e — corners |
|---|---|---|---|---|
| 1/4 in | 20 | 0.4375 | 0.219 | 0.505 max |
| 5/16 in | 18 | 0.5000 | 0.266 | 0.577 max |
| 3/8 in | 16 | 0.5625 | 0.328 | 0.650 max |
| 7/16 in | 14 | 0.6875 | 0.375 | 0.794 max |
| 1/2 in | 13 | 0.7500 | 0.438 | 0.866 max |
| 9/16 in | 12 | 0.8750 | 0.484 | 1.010 max |
| 5/8 in | 11 | 0.9375 | 0.547 | 1.083 max |
| 3/4 in | 10 | 1.1250 | 0.641 | 1.299 max |
| 7/8 in | 9 | 1.3125 | 0.750 | 1.516 max |
| 1 in | 8 | 1.5000 | 0.859 | 1.732 max |
| 1-1/4 in | 7 | 1.8750 | 1.063 | 2.165 max |
| 1-1/2 in | 6 | 2.2500 | 1.281 | 2.598 max |