| Customization: | Available |
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| Material: | Carbon Steel |
| Type: | Hexagon Head |
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This specification covers a variety of carbon, alloy, and martensitic stainless steel nuts in the size range 1⁄4 through 4 in. and metric M6 through M100 nominal. It also covers austenitic stainless steel nuts in the size range 1⁄4 in.. These nuts are intended for high-pressure or high temperature service, or both
Dimensions for Heavy Hex Nuts(ASME/ANSI B18.2.2)
| Diameter | Width Across Flats F | Thickness H | Width Across Corners G | |||||
| Nom | max | min | Nom | max | min | max | min | |
| 1/4 | 1/2 | 0.500 | 0.488 | 15/64 | 0.250 | 0.218 | 0.577 | 0.556 |
| 5/16 | 9/16 | 0.562 | 0.546 | 19/64 | 0.314 | 0.280 | 0.650 | 0.622 |
| 3/8 | 11/16 | 0.688 | 0.669 | 23/64 | 0.377 | 0.341 | 0.794 | 0.762 |
| 7/16 | 3/4 | 0.750 | 0.728 | 27/64 | 0.441 | 0.403 | 0.866 | 0.768 |
| 1/2 | 7/8 | 0.875 | 0.850 | 31/64 | 0.504 | 0.464 | 1.010 | 0.969 |
| 9/16 | 15/16 | 0.938 | 0.909 | 35/64 | 0.568 | 0.526 | 1.083 | 1.037 |
| 5/8 | 1 1/16 | 1.062 | 1.031 | 39/64 | 0.631 | 0.587 | 1.227 | 1.175 |
| 3/4 | 1 1/4 | 1.250 | 1.213 | 47/64 | 0.758 | 0.710 | 1.443 | 1.382 |
| 7/8 | 1 7/16 | 1.438 | 1.394 | 55/64 | 0.885 | 0.833 | 1.660 | 1.589 |
| 1 | 1 5/8 | 1.625 | 1.575 | 35/64 | 0.575 | 0.519 | 1.876 | 1.796 |
| 1 1/8 | 1 13/16 | 1.812 | 1.756 | 1 7/64 | 1.139 | 1.079 | 2.093 | 2.002 |
| 1 1/4 | 2 | 2.000 | 1.938 | 1 7/32 | 1.251 | 1.187 | 2.309 | 2.209 |
| 1 3/8 | 2 3/16 | 2.188 | 2.119 | 1 11/32 | 1.378 | 1.310 | 2.526 | 2.416 |
| 1 1/2 | 2 3/8 | 2.375 | 2.300 | 1 15/32 | 1.505 | 1.433 | 2.742 | 2.622 |
| 1 5/8 | 2 9/16 | 2.562 | 2.481 | 1 19/32 | 1.632 | 1.556 | 2.959 | 2.828 |
| 1 3/4 | 2 3/4 | 2.750 | 2.663 | 1 23/32 | 1.759 | 1.679 | 3.175 | 3.035 |
| 1 7/8 | 2 15/16 | 2.938 | 2.844 | 1 27/32 | 1.886 | 1.802 | 3.392 | 3.242 |
| 2 | 3 1/8 | 3.125 | 3.025 | 1 31/32 | 2.013 | 1.925 | 3.608 | 3.449 |
| 2 1/4 | 3 1/2 | 3.500 | 3.388 | 2 13/64 | 2.251 | 2.155 | 4.041 | 3.862 |
| 2 1/2 | 3 7/8 | 3.875 | 3.750 | 2 29/64 | 2.505 | 2.401 | 4.474 | 4.275 |
| 2 3/4 | 4 1/4 | 4.250 | 4.113 | 2 45/64 | 2.759 | 2.647 | 4.907 | 4.688 |
| 3 | 4 5/8 | 4.625 | 4.475 | 2 61/64 | 3.013 | 2.893 | 5.340 | 5.102 |
| 3 1/4 | 5 | 5.000 | 4.838 | 3 3/16 | 3.252 | 3.124 | 5.774 | 5.515 |
| 3 1/2 | 5 3/8 | 5.375 | 5.200 | 3 7/16 | 3.506 | 3.370 | 6.207 | 5.928 |
| 3 3/4 | 5 3/4 | 5.750 | 5.563 | 3 11/16 | 3.760 | 3.616 | 6.640 | 6.341 |
| 4 | 6 1/8 | 6.125 | 5.925 | 3 15/16 | 4.014 | 3.862 | 7.073 | 6.755 |
ASTM A194 Grade 8MA nuts are available in form of hex nuts, heavy hex nuts and square nuts, manufactured from high tensile stainless steel 316 material.
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