Hex Nuts

Hex Nuts

 

Hex nuts (also referred to as finished hex nuts) are available in ASTM A563-A and compatible with low carbon steel bolts such as ASTM A307, ASTM F1554 grade 36, SAE grade 2, and AASHTO M183. SAE grade 5 and grade 8 nuts are also available in a finished pattern. Since hot-dip galvanizing typically adds 2.2 to 5 mils of thickness to the threaded portion of a fastener, galvanized hex nuts are tapped oversize to compensate for the corrosion resistant coating on the bolts.

Dimensions

Nominal Size F C H
Width Across Flats Width Across Corners Thickness
Basic Max Min Max Min Basic Max Min
1/4 7/16 0.438 0.428 0.505 0.488 7/32 0.226 0.212
5/16 1/2 0.500 0.489 0.577 0.557 17/64 0.273 0.258
3/8 9/16 0.562 0.551 0.650 0.628 21/64 0.337 0.320
1/2 3/4 0.750 0.736 0.866 0.840 7/16 0.448 0.427
5/8 15/16 0.938 0.922 1.083 1.051 35/64 0.559 0.535
3/4 1-1/8 1.125 1.088 1.299 1.240 41/64 0.665 0.617
7/8 1-5/16 1.312 1.269 1.516 1.447 3/4 0.776 0.724
1 1-1/2 1.500 1.450 1.732 1.653 55/64 0.887 0.831
1-1/8 1-11/16 1.688 1.631 1.949 1.859 31/32 0.999 0.939
1-1/4 1-7/8 1.875 1.812 2.165 2.066 1-1/16 1.094 1.030
1-3/8 2-1/16 2.062 1.994 2.382 2.273 1-11/64 1.206 1.138
1-1/2 2-1/4 2.250 2.175 2.598 2.480 1-9/32 1.317 1.245
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