Finished Hex Lock Nut Dimensions
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| Nominal Size |
F |
C |
H |
Weight
Each (lbs.) |
| Width Across Flats |
Width Across Corners |
Thickness |
| Basic |
Max |
Min |
Max |
Min |
Basic |
Max |
Min |
| 1⁄2 |
3⁄4 |
0.750 |
0.736 |
0.866 |
0.840 |
7⁄16 |
0.448 |
0.427 |
0.04 |
| 5⁄8 |
15⁄16 |
0.938 |
0.922 |
1.083 |
1.051 |
35⁄64 |
0.559 |
0.535 |
0.07 |
| 3⁄4 |
11⁄8 |
1.125 |
1.088 |
1.299 |
1.240 |
41⁄64 |
0.665 |
0.617 |
0.12 |
| 7⁄8 |
15⁄16 |
1.312 |
1.269 |
1.516 |
1.447 |
3⁄4 |
0.776 |
0.724 |
0.19 |
| 1 |
11⁄2 |
1.500 |
1.450 |
1.732 |
1.653 |
55⁄64 |
0.887 |
0.831 |
0.28 |
| 11⁄8 |
111⁄16 |
1.688 |
1.631 |
1.949 |
1.859 |
31⁄32 |
0.999 |
0.939 |
0.40 |
| 11⁄4 |
17⁄8 |
1.875 |
1.812 |
2.165 |
2.066 |
11⁄16 |
1.094 |
1.030 |
0.54 |
| 13⁄8 |
21⁄16 |
2.062 |
1.994 |
2.382 |
2.273 |
111⁄64 |
1.206 |
1.138 |
0.73 |
| 11⁄2 |
21⁄4 |
2.250 |
2.175 |
2.598 |
2.480 |
19⁄32 |
1.317 |
1.245 |
0.94 |
| Dimensions per ASME B18.2.2 1987 (1999) |
