Square nuts are typically used in conjunction with square bolts or are commonly used with pole line hardware. Since hot-dip galvanizing typically adds 2.2 to 5 mils of thickness to the threaded portion of a fastener, galvanized hex square nuts are tapped oversize to compensate for the corrosion resistant coating on the bolts.

Stock

Diameters: 1/2″ – 1″
Origin: Import
Finish: Black 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 Black Galvanized
12 1316 0.812 0.788 1.149 1.052 716 0.458 0.418 18987 11854
58 1 1.000 0.969 1.414 1.300 3564 0.569 0.525 18988 11856
34 118 1.125 1.088 1.591 1.464 2132 0.680 0.632 11857 11858
78 1516 1.312 1.269 1.856 1.712 4964 0.792 0.740 11859 11860
1 112 1.500 1.450 2.121 1.961 78 0.903 0.847 11861 11862
118 11116 1.688 1.631 2.386 2.209 1 1.030 0.970 - -
114 178 1.875 1.812 2.652 2.458 1332 1.126 1.062 11863 11864
138 2116 2.062 1.994 2.917 2.708 11364 1.237 1.169 - -
112 214 2.250 2.175 3.182 2.956 1516 1.348 1.276 - -

Dimensions per ASME B18.2.2 1987 (1999)