ASME B18.2.2 Heavy Hex Flat Jam Nuts

ASME B18.2.2 Heavy Hex Flat Jam Nuts

Nominal Size or Basic Major Dia. of Thread Width Across FlatsF Width Across CornersG Thickness, Heavy Hex Flat Jam Nuts H1
Basic Max. Min. Max. Min. Basic Max. Min.
ASME B18.2.2 - 1 1⁄8 1.125 113⁄16 1.812 1.756 2.093 2.002 5⁄8 0.655 0.579
ASME B18.2.2 - 1 1⁄4 1.25 2 2 1.938 2.309 2.209 3⁄4 0.782 0.687
ASME B18.2.2 - 1 3⁄8 1.375 23⁄16 2.188 2.119 2.526 2.416 1 3⁄16 0.846 0.747
ASME B18.2.2 - 1 1⁄2 1.5 23⁄8 2.375 2.3 2.742 2.622 7⁄8 0.911 0.808
ASME B18.2.2 - 1 3⁄4 1.75 23⁄4 2.75 2.662 3.175 3.035 1 1.04 0.929
ASME B18.2.2 - 2 2 31⁄8 3.125 3.025 3.608 3.449 1 1⁄8 1.169 1.05
ASME B18.2.2 - 2 1⁄4 2.25 31⁄2 3.5 3.388 4.041 3.862 1 1⁄4 1.298 1.155
ASME B18.2.2 - 2 1⁄2 2.5 37⁄8 3.875 3.75 4.474 4.275 1 1⁄2 1.552 1.401
ASME B18.2.2 - 2 3⁄4 2.75 41⁄4 4.25 4.112 4.907 4.688 1 5⁄8 1.681 1.522
ASME B18.2.2 - 3 3 45⁄8 4.625 4.475 5.34 5.102 1 3⁄4 1.81 1.643
ASME B18.2.2 - 3 1⁄4 3.25 5 5 4.838 5.774 5.515 1 7⁄8 1.939 1.748
ASME B18.2.2 - 3 1⁄2 3.5 53⁄8 5.375 5.2 6.207 5.928 2 2.068 1.87
ASME B18.2.2 - 3 3⁄4 3.75 53⁄4 5.75 5.562 6.64 6.341 2 1⁄8 2.197 1.99
ASME B18.2.2 - 4 4 61⁄8 6.125 5.925 7.073 6.755 2 1⁄4 2.326 2.112
  • All dimensions are in inches.
  • Bold type indicates nuts unified dimensionally with British and Canadian Standards.
  • Threads are Unified Coarse-thread series (UNC), Class 2B.