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A563 Grade A Heavy Hex Nuts

A563 Grade A Heavy Hex Nuts


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A563 Grade A Heavy Hex Nuts

Grade A Heavy Hex Nuts are manufactured from low carbon steel, 1008-1010 for sizes up to 1 inch (cold-formed) and 1045 steel for sizes over 1 inch (hot-formed). Material is manufactured to meet or exceed ASTM A563 Grade A. Zinc plated material will meet or exceed ASTM F1941. Hot-Dip Galvanized material will meet or exceed ASTM A563. Typical hardness is HRB 68 - HRC 32. Proof load strength will meet a minimum of 100,000 psi and 75,000 psi for Hot-Dip Galvanized nuts.

 
A563 Grade A Heavy Hex Nuts
Nominal Size or Basic
Major Diameter
of Thread
Width Across Flats Width Across
Corners
Thickness
Basic Max. Min Max Min Basic. Max Min.
1/4 0.2500 1/2 0.500 0.488 0.577 0.556 15/64 0.250 0.218
5/16 0.3125 9/16 0.562 0.546 0.650 0.622 19/64 0.314 0.280
3/8 0.3750 11/16 0.688 0.669 0.794 0.763 23/64 0.377 0.341
7/16 0.4375 3/4 0.750 0.728 0.866 0.830 27/64 0.441 0.403
1/2 0.5000 7/8 0.875 0.850 1.010 0.969 31/64 0.504 0.464
9/16 0.5625 15/16 0.938 0.909 1.083 1.037 35/64 0.568 0.526
5/8 0.6250 1 1/16 1.062 1.031 1.227 1.175 39/64 0.631 0.587
3/4 0.7500 1 1/4 1.250 1.212 1.443 1.382 47/64 0.758 0.710
7/8 0.8750 1 7/16 1.438 1.394 1.660 1.589 55/64 0.885 0.833
1 1.0000 1 5/8 1.625 1.575 1.876 1.796 63/64 1.012 0.956
1 1/8 1.1250 1 13/16 1.812 1.756 2.093 2.002 1-7/64 1.139 1.079
1 1/4 1.2500 2 2.000 1.938 2.309 2.209 1-7/32 1.251 1.187
1 3/8 1.3750 2 3/16 2.188 2.119 2.526 2.416 1-11/32 1.378 1.310
1 1/2 1.5000 2 3/8 2.375 2.300 2.742 2.622 1-15/32 1.505 1.433
1 5/8 1.6250 2 9/16 2.562 2.481 2.959 2.828 1-19/32 1.632 1.556
1 3/4 1.7500 2 3/4 2.750 2.662 3.175 3.035 1-23/32 1.759 1.679
2 2.0000 3 1/8 3.125 3.025 3.608 3.449 1-31/32 2.013 1.925
2 1/4 2.2500 3 1/2 3.500 3.388 4.041 3.862 2-13/64 2.251 2.155
2 1/2 2.5000 3 7/8 3.875 3.750 4.474 4.275 2-29/64 2.505 2.401
2 3/4 2.7500 4 1/4 4.250 4.112 4.907 4.688 2-45/64 2.759 2.647
3 3.0000 4 5/8 4.625 4.475 5.340 5.102 2-61/64 3.013 2.893
3 1/4 3.2500 5 5.000 4.838 5.774 5.515 3-3/16 3.252 3.124
3 1/2 3.5000 5 3/8 5.375 5.200 6.207 5.928 3-7/16 3.506 3.370
3 3/4 3.7500 5 3/4 5.750 5.562 6.640 6.341 3-11/16 3.760 3.616
4 4.0000 6 1/8 6.125 5.925 7.073 6.755 3-15/16 4.014 3.862