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Hex Nut Dimensions

Click table to show drawingHeavy Hex Nut
Nominal Size F C H Part Numbers
Width Across Flats Width Across Corners Thickness Domestic Import
Basic Max Min Max Min Basic Max Min Plain Galvanized Plain Galvanized
1⁄2 3⁄4 0.750 0.736 0.866 0.840 7⁄16 0.448 0.427 16270 16271 11701 11702
5⁄8 15⁄16 0.938 0.922 1.083 1.051 35⁄64 0.559 0.535 16272 16273 11703 11704
3⁄4 11⁄8 1.125 1.088 1.299 1.240 41⁄64 0.665 0.617 16274 16275 11705 11706
7⁄8 15⁄16 1.312 1.269 1.516 1.447 3⁄4 0.776 0.724 16276 16277 11707 11708
1 11⁄2 1.500 1.450 1.732 1.653 55⁄64 0.887 0.831 16278 16279 11709 11710
11⁄8 111⁄16 1.688 1.631 1.949 1.859 31⁄32 0.999 0.939 16280 16281 11711 11712
11⁄4 17⁄8 1.875 1.812 2.165 2.066 11⁄16 1.094 1.030 16282 16283 11713 11714
13⁄8 21⁄16 2.062 1.994 2.382 2.273 111⁄64 1.206 1.138 - - 11715 11716
11⁄2 21⁄4 2.250 2.175 2.598 2.480 19⁄32 1.317 1.245 16286 16287 11717 11718

Dimensions per ASME B18.2.2 1987 (1999)

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