Dimensions of Imperial Heavy Hex Flat Nuts to ASME B18.2.2 Standard

Dimensions of Imperial Heavy Hex Flat Nuts to ASME B18.2.2 Standard

Nominal Size
Inch
Basic Major
Thread Diameter
Width Across Flats, F Width Across Corners, G Thickness Flat Nuts, H
Basic Min. Max. Min. Max. Basic Min. Max.
1 1/8 1.1250 1 13/16 1.756 1.812 2.002 2.093 1 1/8 1.079 1.155
1 1/4 1.2500 2 1.938 2.000 2.209 2.309 1 1/4 1.187 1.282
1 3/8 1.3750 2 3/16 2.119 2.188 2.416 2.526 1 3/8 1.310 1.409
1 1/2 1.5000 2 3/8 2.300 2.375 2.622 2.742 1 1/2 1.433 1.536
1 3/4 1.7500 2 3/4 2.662 2.750 3.035 3.175 1 3/4 1.679 1.790
2 2.0000 3 1/8 3.025 3.125 3.449 3.608 2 1.925 2.044
2 1/4 2.2500 3 1/2 3.388 3.500 3.862 4.041 2 1/4 2.155 2.298
2 1/2 2.5000 3 7/8 3.750 3.875 4.275 4.474 2 1/2 2.401 2.552
2 3/4 2.7500 4 1/4 4.112 4.250 4.688 4.907 2 3/4 2.647 2.806
3 3.0000 4 5/8 4.475 4.625 5.102 5.340 3 2.893 3.060
3 1/4 3.2500 5 4.838 5.000 5.515 5.774 3 1/4 3.124 3.314
3 1/2 3.5000 5 3/8 5.200 5.375 5.928 6.207 3 1/2 3.370 3.568
3 3/4 3.7500 5 3/4 5.562 5.750 6.341 6.640 3 3/4 3.616 3.822
4 4.0000 6 1/8 5.925 6.125 6.755 7.073 4 3.862 4.076