Unit of Measure
Items
Heavy Hex Nuts1

Heavy Hex Nut, 1/4" Nominal Dia.

Heavy Hex Nuts1

Heavy Hex Nut, 5/16" Nominal Dia.

Heavy Hex Nuts1

Heavy Hex Nut, 3/8" Nominal Dia.

Heavy Hex Nuts1

Heavy Hex Nut, 7/16" Nominal Dia.

Heavy Hex Nuts1

Heavy Hex Nut, 1/2" Nominal Dia.
Manufacturer N/A Industrial Fasteners Institute
Product N/A Nuts
Codes and Standards N/A ASME/ANSI B18.2.2 1987 (R 1999)
Unit of Measure N/A English
Nominal Size or Basic Major Dia. of Thread N/A 1/4 in N/A 5/16 in N/A 3/8 in N/A 7/16 in N/A 1/2 in
Nominal Size or Basic Major Dia. of Thread (Decimal) N/A 0.2500 in N/A 0.3125 in N/A 0.3750 in N/A 0.4375 in N/A 0.5000 in
Basic Width Across Flats (F) N/A 1/2 in N/A 9/16 in N/A 11/16 in N/A 3/4 in N/A 7/8 in
Max. Width Across Flats (F) N/A 0.500 in N/A 0.562 in N/A 0.688 in N/A 0.750 in N/A 0.875 in
Min. Width Across Flats (F) N/A 0.488 in N/A 0.546 in N/A 0.669 in N/A 0.728 in N/A 0.850 in
Max. Width Across Corners (G) N/A 0.577 in N/A 0.650 in N/A 0.794 in N/A 0.866 in N/A 1.010 in
Min. Width Across Corners (G) N/A 0.556 in N/A 0.622 in N/A 0.763 in N/A 0.830 in N/A 0.969 in
Basic Thickness (H) N/A 15/64 in N/A 19/64 in N/A 23/64 in N/A 27/64 in N/A 31/64 in
Max. Thickness (H) N/A 0.250 in N/A 0.314 in N/A 0.377 in N/A 0.441 in N/A 0.504 in
Min. Thickness (H) N/A 0.218 in N/A 0.280 in N/A 0.341 in N/A 0.403 in N/A 0.464 in
Max. Runout of Bearing Face, FIM (Specified Proof Load Up to 150,000 psi) N/A 0.017 in N/A 0.020 in N/A 0.021 in N/A 0.022 in N/A 0.023 in
Max. Runout of Bearing Face, FIM (Specified Proof Load 150,000 psi and Greater) N/A 0.011 in N/A 0.012 in N/A 0.014 in N/A 0.015 in N/A 0.016 in
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