Hex Jam Nut Dimensions
| Nominal Size | F | C | H | Part Numbers | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Width Across Flats | Width Across Corners | Thickness | ||||||||
| Basic | Max | Min | Max | Min | Basic | Max | Min | Plain | Galvanized | |
| 1⁄2 | 3⁄4 | 0.750 | 0.736 | 0.866 | 0.840 | 5⁄16 | 0.323 | 0.302 | 11827 | 11828 |
| 5⁄8 | 15⁄16 | 0.938 | 0.922 | 1.083 | 1.051 | 3⁄8 | 0.387 | 0.363 | 11829 | 11830 |
| 3⁄4 | 11⁄8 | 1.125 | 1.088 | 1.299 | 1.240 | 27⁄64 | 0.446 | 0.398 | 11831 | 11832 |
| 7⁄8 | 15⁄16 | 1.312 | 1.269 | 1.516 | 1.447 | 31⁄64 | 0.510 | 0.458 | 11833 | 18834 |
| 1 | 11⁄2 | 1.500 | 1.450 | 1.732 | 1.653 | 35⁄64 | 0.575 | 0.519 | 11835 | 11836 |
| 11⁄8 | 111⁄16 | 1.688 | 1.631 | 1.949 | 1.859 | 39⁄64 | 0.639 | 0.579 | 11837 | 11838 |
| 11⁄4 | 17⁄8 | 1.875 | 1.812 | 2.165 | 2.066 | 23⁄32 | 0.751 | 0.687 | 11839 | 11840 |
| 13⁄8 | 21⁄16 | 2.062 | 1.994 | 2.382 | 2.273 | 25⁄32 | 0.815 | 0.747 | 19678 | 19679 |
| 11⁄2 | 21⁄4 | 2.250 | 2.175 | 2.598 | 2.480 | 27⁄32 | 0.880 | 0.808 | 11841 | 11842 |
|
Dimensions per ASME B18.2.2 1987 (1999) |
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