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ASME B18.2.2 Heavy Hex Slotted Nuts

ASME B18.2.2 Heavy Hex Slotted Nuts

ASME B18.2.2 Heavy Hex Slotted Nuts Dimensions (mm)

Nominal Size or Basic Major Dia. of Thread Width Across Flats F Width Across Corners G Thickness H Unslotted Thickness T Width of Slot S
Basic Max. Min. Max. Min. Basic Max. Min. Max. Min. Max. Min.
ASME B18.2.2 - 1⁄4 6.350 11.113 11.125 10.871 12.827 12.395 5.556 5.740 5.385 3.556 3.048 2.540 1.778
ASME B18.2.2 - 5⁄16 7.938 12.700 12.700 12.421 14.656 14.656 6.747 6.934 6.553 4.572 4.064 3.048 2.286
ASME B18.2.2 - 3⁄8 9.525 14.288 14.275 13.995 16.510 15.951 8.334 8.560 8.128 5.334 4.826 3.810 3.048
ASME B18.2.2 - 7⁄16 11.113 17.463 17.475 17.145 20.168 19.507 9.525 9.779 9.271 5.842 5.334 3.810 3.048
ASME B18.2.2 - 1⁄2 12.700 19.050 19.050 18.694 21.996 21.336 11.113 11.379 10.846 7.366 6.858 4.572 3.810
ASME B18.2.2 - 9⁄16 14.288 22.225 22.225 21.869 25.654 24.943 12.303 12.598 12.014 7.874 7.366 4.572 3.810
ASME B18.2.2 - 5⁄8 15.875 23.813 23.825 23.419 27.508 26.695 13.891 14.199 13.589 8.636 8.128 6.096 4.572
ASME B18.2.2 - 3⁄4 19.050 28.575 28.575 27.635 32.995 31.496 16.272 16.891 15.672 10.160 9.652 6.096 4.572
ASME B18.2.2 - 7⁄8 22.225 33.338 33.325 32.233 38.506 36.754 19.050 19.710 18.390 13.208 12.446 6.096 4.572
ASME B18.2.2 - 1 25.400 38.100 38.100 36.830 43.993 41.986 21.828 22.530 21.107 14.986 14.224 7.620 6.096
ASME B18.2.2 - 1 1⁄8 28.575 42.863 42.875 41.427 49.505 47.219 24.606 25.375 23.851 16.256 15.494 8.382 6.096
ASME B18.2.2 - 1 1⁄4 31.750 47.625 47.625 46.025 54.991 52.476 26.988 27.788 26.162 17.780 17.018 10.160 7.874
ASME B18.2.2 - 1 3⁄8 34.925 52.388 52.375 50.648 60.503 57.734 29.766 30.632 28.905 20.828 19.812 10.160 7.874
ASME B18.2.2 - 1 1⁄2 38.100 57.150 57.150 55.245 65.989 62.992 32.544 33.452 31.623 21.844 20.828 11.684 9.398
  • All dimensions are in millimeters.
  • Bold type indicates nuts unified dimensionally with British and Canadian Standards.
  • Threads are Unified Coarse-, Fine-, or 8-thread series (UNC, UNF, or 8UN), Class 2B.
  • Unification of fine-thread nuts is limited to sizes 25.4 mm (1 inch) and under.

ASME B18.2.2 Heavy Hex Slotted Nuts Dimensions (Inch)

Nominal Size or Basic Major Dia. of Thread Width Across Flats F Width Across Corners G Thickness H Unslotted Thickness T Width of Slot S
Basic Max. Min. Max. Min. Basic Max. Min. Max. Min. Max. Min.
ASME B18.2.2 - 1⁄4 0.25 7⁄16 0.438 0.428 0.505 0.488 7⁄32 0.226 0.212 0.14 0.12 0.1 0.07
ASME B18.2.2 - 5⁄16 0.3125 1⁄2 0.5 0.489 0.577 0.577 17⁄64 0.273 0.258 0.18 0.16 0.12 0.09
ASME B18.2.2 - 3⁄8 0.375 9⁄16 0.562 0.551 0.65 0.628 21⁄64 0.337 0.32 0.21 0.19 0.15 0.12
ASME B18.2.2 - 7⁄16 0.4375 11⁄16 0.688 0.675 0.794 0.768 3⁄8 0.385 0.365 0.23 0.21 0.15 0.12
ASME B18.2.2 - 1⁄2 0.5 3⁄4 0.75 0.736 0.866 0.84 7⁄16 0.448 0.427 0.29 0.27 0.18 0.15
ASME B18.2.2 - 9⁄16 0.5625 7⁄8 0.875 0.861 1.01 0.982 31⁄64 0.496 0.473 0.31 0.29 0.18 0.15
ASME B18.2.2 - 5⁄8 0.625 15⁄16 0.938 0.922 1.083 1.051 35⁄64 0.559 0.535 0.34 0.32 0.24 0.18
ASME B18.2.2 - 3⁄4 0.75 1 1⁄8 1.125 1.088 1.299 1.24 41⁄64 0.665 0.617 0.4 0.38 0.24 0.18
ASME B18.2.2 - 7⁄8 0.875 1 5⁄16 1.312 1.269 1.516 1.447 3⁄4 0.776 0.724 0.52 0.49 0.24 0.18
ASME B18.2.2 - 1 1 1 1⁄2 1.5 1.45 1.732 1.653 55⁄64 0.887 0.831 0.59 0.56 0.3 0.24
ASME B18.2.2 - 11⁄8 1.125 1 11⁄16 1.688 1.631 1.949 1.859 31⁄32 0.999 0.939 0.64 0.61 0.33 0.24
ASME B18.2.2 - 11⁄4 1.25 1 7⁄8 1.875 1.812 2.165 2.066 11⁄16 1.094 1.03 0.7 0.67 0.4 0.31
ASME B18.2.2 - 13⁄8 1.375 2 1⁄16 2.062 1.994 2.382 2.273 111⁄64 1.206 1.138 0.82 0.78 0.4 0.31
ASME B18.2.2 - 11⁄2 1.5 2 1⁄4 2.25 2.175 2.598 2.48 19⁄32 1.317 1.245 0.86 0.82 0.46 0.37
  • All dimensions are in inches.
  • Bold type indicates nuts unified dimensionally with British and Canadian Standards.
  • Threads are Unified Coarse-, Fine-, or 8-thread series (UNC, UNF, or 8UN), Class 2B.
  • Unification of fine-thread nuts is limited to sizes 1 inch and under.