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Grade 2 Square Nuts

Grade 2 Square Nuts


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Grade 2 Square Nuts

Four-sided internally threaded nuts with flat bottom side and a chamfered, washer-crowned top. Designed primarily for use with square bolts.

 
ANSI/ASME B18.2.2Grade 2 Square Nuts
Nominal 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 7/16 0.438 0.425 0.619 0.554 7/32 0.235 0.203
5/16 0.3125 9/16 0.562 0.547 0.795 0.721 17/64 0.283 0.249
3/8 0.3750 5/8 0.625 0.606 0.884 0.802 21/64 0.346 0.310
7/16 0.4375 3/4 0.750 0.728 1.061 0.970 3/8 0.394 0.356
1/2 0.5000 13/16 0.812 0.788 1.149 1.052 7/16 0.458 0.418
5/8 0.6250 1 1.000 0.969 1.414 1.300 35/64 0.569 0.525
3/4 0.7500 1-1/8 1.125 1.088 1.591 1.464 21/32 0.680 0.632
7/8 0.8750 1-5/16 1.312 1.269 1.856 1.712 49/64 0.792 0.740
1 1.0000 1-1/2 1.500 1.450 2.121 1.961 7/8 0.903 0.847
1-1/8 1.1250 1-11/16 1.688 1.631 2.386 2.209 1 1.030 0.970
1-1/4 1.2500 1-7/8 1.875 1.812 2.652 2.458 1-3/32 1.126 1.062
1-1/2 1.5000 2-1/4 2.250 2.175 3.182 2.956 1-5/16 1.348 1.276