Well, square nuts are used generally along with square bolts. They are also commonly used with pole line equipment/hardware. As hot-dip galvanizing generally adds 2.2 - 5 mils thickness to a fastener’s threaded portion, our galvanized hex square nuts get tapped oversize so as to balance the bolts’ corrosion resistant coating.

Stock

Diameters: 1/2″ – 1″
Origin: Import
Finish: Plain and hot-dip galvanized

Dimensions

Click table to show drawingSquare Nut
Nominal Size F C H Part Numbers
Width Across Flats Width Across Corners Thickness
Basic Max Min Max Min Basic Max Min Plain Galvanized
1⁄2 13⁄16 0.812 0.788 1.149 1.052 7⁄16 0.458 0.418 18987 11854
5⁄8 1 1.000 0.969 1.414 1.300 35⁄64 0.569 0.525 18988 11856
3⁄4 11⁄8 1.125 1.088 1.591 1.464 21⁄32 0.680 0.632 11857 11858
7⁄8 15⁄16 1.312 1.269 1.856 1.712 49⁄64 0.792 0.740 11859 11860
1 11⁄2 1.500 1.450 2.121 1.961 7⁄8 0.903 0.847 11861 11862
11⁄8 111⁄16 1.688 1.631 2.386 2.209 1 1.030 0.970 - -
11⁄4 17⁄8 1.875 1.812 2.652 2.458 13⁄32 1.126 1.062 11863 11864
13⁄8 21⁄16 2.062 1.994 2.917 2.708 113⁄64 1.237 1.169 - -
11⁄2 21⁄4 2.250 2.175 3.182 2.956 15⁄16 1.348 1.276 - -

Dimensions per ASME B18.2.2 1987 (1999)