Heavy 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 |
7⁄8 |
0.875 |
0.850 |
1.010 |
0.969 |
31⁄64 |
0.504 |
0.464 |
0.07 |
| 5⁄8 |
11⁄16 |
1.062 |
1.031 |
1.227 |
1.175 |
39⁄64 |
0.631 |
0.587 |
0.12 |
| 3⁄4 |
11⁄4 |
1.250 |
1.212 |
1.443 |
1.382 |
47⁄64 |
0.758 |
0.710 |
0.20 |
| 7⁄8 |
17⁄16 |
1.438 |
1.394 |
1.660 |
1.589 |
55⁄64 |
0.885 |
0.833 |
0.30 |
| 1 |
15⁄8 |
1.625 |
1.575 |
1.876 |
1.796 |
63⁄64 |
1.012 |
0.956 |
0.43 |
| 11⁄8 |
113⁄16 |
1.812 |
1.756 |
2.093 |
2.002 |
17⁄64 |
1.139 |
1.079 |
0.59 |
| 11⁄4 |
2 |
2.000 |
1.938 |
2.309 |
2.209 |
17⁄32 |
1.251 |
1.187 |
0.79 |
| 13⁄8 |
23⁄16 |
2.188 |
2.119 |
2.526 |
2.416 |
111⁄32 |
1.378 |
1.310 |
1.02 |
| 11⁄2 |
23⁄8 |
2.375 |
2.300 |
2.742 |
2.622 |
115⁄32 |
1.505 |
1.433 |
1.31 |
| 15⁄8 |
29⁄16 |
2.562 |
2.481 |
2.959 |
2.828 |
119⁄32 |
1.632 |
1.556 |
1.62 |
| 13⁄4 |
23⁄4 |
2.750 |
2.662 |
3.175 |
3.035 |
123⁄32 |
1.759 |
1.679 |
2.04 |
| 17⁄8 |
215⁄16 |
2.938 |
2.844 |
3.392 |
3.242 |
127⁄32 |
1.886 |
1.802 |
2.41 |
| 2 |
31⁄8 |
3.125 |
3.025 |
3.608 |
3.449 |
131⁄32 |
2.013 |
1.925 |
2.99 |
| 21⁄4 |
31⁄2 |
3.500 |
3.388 |
4.041 |
3.862 |
213⁄64 |
2.251 |
2.155 |
4.19 |
| 21⁄2 |
37⁄8 |
3.875 |
3.750 |
4.474 |
4.275 |
229⁄64 |
2.505 |
2.401 |
5.64 |
| 23⁄4 |
41⁄4 |
4.250 |
4.112 |
4.907 |
4.688 |
245⁄64 |
2.759 |
2.647 |
7.38 |
| 3 |
45⁄8 |
4.625 |
4.475 |
5.340 |
5.102 |
261⁄64 |
3.013 |
2.893 |
9.50 |
| 31⁄4 |
5 |
5.000 |
4.838 |
5.774 |
5.515 |
33⁄16 |
3.252 |
3.124 |
11.94 |
| 31⁄2 |
53⁄8 |
5.375 |
5.200 |
6.207 |
5.928 |
37⁄16 |
3.506 |
3.370 |
15.26 |
| 33⁄4 |
53⁄4 |
5.750 |
5.562 |
6.640 |
6.341 |
311⁄16 |
3.760 |
3.616 |
18.12 |
| 4 |
61⁄8 |
6.125 |
5.925 |
7.073 |
6.755 |
315⁄16 |
4.014 |
3.862 |
21.80 |
| Dimensions per ASME B18.2.2 1987 (1999) |
