Hex Jam

The hex jam nuts appear thinner compared to a standard hex nut; however, across the corners and flats, they possess the same dimension. There are two common applications of Hex jam nuts. It is possible to thread a hex jam nut onto a bolt & run tight against a standard nut. This phenomenon locks the nut in place as well as prevents it from pulling back. These nuts are also used for leveling purposes.

Stock

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

Dimensions

Click table to show drawingHex Jam 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
12 34 0.750 0.736 0.866 0.840 516 0.323 0.302 11827 11828
58 1516 0.938 0.922 1.083 1.051 38 0.387 0.363 11829 11830
34 118 1.125 1.088 1.299 1.240 2764 0.446 0.398 11831 11832
78 1516 1.312 1.269 1.516 1.447 3164 0.510 0.458 11833 18834
1 112 1.500 1.450 1.732 1.653 3564 0.575 0.519 11835 11836
118 11116 1.688 1.631 1.949 1.859 3964 0.639 0.579 11837 11838
114 178 1.875 1.812 2.165 2.066 2332 0.751 0.687 11839 11840
138 2116 2.062 1.994 2.382 2.273 2532 0.815 0.747 19678 19679
112 214 2.250 2.175 2.598 2.480 2732 0.880 0.808 11841 11842

Dimensions per ASME B18.2.2 1987 (1999)