Hexagon Bolts
Standard Size for Metric Hexagon Bolts |
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| Normal Size | Thread | Pitch | Head Thickness | Across Flat | Shank Dia | Thread Length | Pitch Dia | Major Dia | ||||||
| Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | |||
| M.6.00 | Metric | 1.00 | 3.850 | 4.150 | 9.78 | 10.00 | 5.82 | 6.00 | 18.00 | 20.00 | 5.212 | 5.324 | 5.794 | 5.974 |
| M.8.00 | Metric | 1.25 | 5.150 | 5.450 | 12.73 | 13.00 | 7.78 | 8.00 | 22.00 | 24.50 | 7.024 | 7.160 | 7.760 | 7.972 |
| M.10.00 | Metric | 1.50 | 6.820 | 7.180 | 16.73 | 17.00 | 9.78 | 10.00 | 26.00 | 29.00 | 8.862 | 8.994 | 9.732 | 9.968 |
| M.12.00 | Metric | 1.75 | 7.820 | 8.180 | 18.67 | 19.00 | 11.73 | 12.00 | 30.00 | 33.50 | 10.679 | 10.829 | 11.701 | 11.966 |
| M.14.00 | Metric | 2.00 | 8.820 | 9.180 | 21.67 | 22.00 | 13.73 | 14.00 | 34.00 | 38.00 | 12.503 | 12.663 | 13.682 | 13.962 |
| M.16.00 | Metric | 2.00 | 9.820 | 10.180 | 23.67 | 24.00 | 15.73 | 16.00 | 38.00 | 42.00 | 14.503 | 14.663 | 15.682 | 15.962 |
Standard Size for Inch Hexagon Bolts |
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| Normal Size | Thread | Pitch | Head Thickness | Across Flat | Shank Dia | Thread Length | Pitch Dia | Major Dia | ||||||
| Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | |||
| 1/4" | BSW BSF |
20 26 |
4.216 | 4.470 | 11.125 | 11.303 | 6.261 | 6.350 | 12.70 | 16.70 | 5.408 5.603 |
5.507 5.679 |
6.165 6.177 |
6.320 6.322 |
| 5/16" | BSW BSF |
18 22 |
5.283 | 5.537 | 13.157 | 13.335 | 7.849 | 7.938 | 15.80 | 19.80 | 6.894 7.064 |
7.000 7.168 |
7.737 7.750 |
7.904 7.907 |
| 3/8" | BSW BSF |
16 20 |
6.350 | 6.604 | 15.037 | 15.240 | 9.436 | 9.525 | 19.05 | 23.05 | 8.359 8.567 |
8.473 8.679 |
9.312 9.324 |
9.489 9.492 |
| 7/16" | BSW BSF |
14 18 |
7.417 | 7.671 | 17.831 | 18.034 | 11.011 | 11.112 | 20.20 | 26.20 | 9.792 10.053 |
9.914 10.173 |
10.884 10.897 |
11.074 11.077 |
| 1/2" | BSW BSF |
12 16 |
8.458 | 8.712 | 20.625 | 20.828 | 12.598 | 12.700 | 25.40 | 29.40 | 11.173 11.519 |
11.306 11.646 |
12.456 12.471 |
12.662 12.662 |
| 5/8" | BSW BSF |
11 14 |
10.338 | 10.592 | 25.400 | 25.654 | 15.723 | 15.875 | 31.75 | 36.25 | 14.211 14.536 |
14.354 14.674 |
15.613 15.629 |
15.832 15.834 |
Standard Size forUnified Thread Hexagon Bolts |
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| Normal Size | Thread | Pitch | Head Thickness | Across Flat | Shank Dia | Thread Length | Pitch Dia | Major Dia | ||||||
| Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | |||
| 1/4" | UNC UNF |
20 28 |
3.810 | 4.775 | 10.795 | 11.125 | 6.220 | 6.350 | 19.05 | 22.05 | 6.888 7.127 |
6.990 7.221 |
7.686 7.727 |
7.907 7.910 |
| 5/16" | UNC UNF |
18 24 |
4.953 | 5.969 | 12.294 | 12.700 | 7.785 | 7.930 | 22.25 | 27.25 | 6.888 7.127 |
6.990 7.221 |
7.686 7.727 |
7.907 7.910 |
| 3/8" | UNC UNF |
16 24 |
5.740 | 6.807 | 13.818 | 14.275 | 9.372 | 9.525 | 25.40 | 30.40 | 8.349 8.712 |
8.461 8.0809 |
9.253 9.314 |
9.492 9.497 |
| 7/16" | UNC UNF |
14 20 |
6.909 | 8.026 | 15.316 | 15.875 | 10.934 | 11.112 | 28.60 | 33.60 | 9.779 10.147 |
9.898 10.245 |
10.815 10.874 |
11.077 11.079 |
| 1/2" | UNC UNF |
13 17 |
7.671 | 9.246 | 18.415 | 19.050 | 12.520 | 12.700 | 31.80 | 36.80 | 11.265 11.732 |
11.392 11.841 |
12.385 12.461 |
12.662 12.667 |
| 5/8" | UNC UNF |
11 18 |
9.601 | 11.278 | 23.012 | 23.825 | 15.670 | 15.870 | 38.10 | 43.10 | 14.196 14.803 |
14.336 14.923 |
15.527 15.618 |
15.834 15.839 |
