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ASME B18.2.2 TABLE 4 Standard Dimensions for Hexagon nuts, inch series

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Hexagon nuts and Hexagon Jam nuts

Dimensional Drawing and Technical Diagrams

719_bkBKtk_b18.2.2-table4.jpg

Key Dimensions and Technical Parameters

Dimensions in inches (1 inch=25.4 mm) sourceASME B18.2.2 TABLE 4

Publication date : 2010
Nominal size or Bsic major dia. of the Thread
 Nr. of threads x inch
G min
 G max F min
F max
 H min H max H1 min H1 max
UNC UNF
1/4
 20 28
0.488
 0.505 0.428 0.438 0.212 0.226 0.150 0.163
5/16
 18 24
0.557
 0.577 0.489 0.5 0.258 0.273 0.180 0.195
3/8
 16 24
0.628
 0.650 0.551
0.562
 0.320 0.337 0.210 0.227
7/16
 14 20
0.698
 0.794 0.675
0.625
 0.365 0.385 0.240 0.260
1/2
 13 20
0.840
 0.866 0.736
0.75
 0.427 0.448 0.302 0.323
9/16
 12 18 0.910 1.010 0.861
0.812
 0.473 0.496 0.301 0.324
5/8
 11 18
1.051
 1.083 0.922 0.937 0.535 0.559 0.363 0.387
3/4
 10 16
1.254
 1.299 1.088
1.125
 0.617 0.665 0.398 0.446
7/8
 9 14 1.465 1.516 1.269
1.313
 0.724 0.776 0.458 0.510
1
 8 12
1.675
 1.732 1.450
1.50
 0.831 0.887 0.519 0.575
1-1/8 7 12 1.859 1.949 1.631 1.625 0.939 0.999 0.579 0.639
1-1/4 7 12 2.066 2.165 1.812 1.875 1.030 1.094 0.687 0.751
1-3/8 6 12 2.273 2.382 1.994 2 1.138 1.206 0.747 0.815
1-1/2 6 12 2.480 2.598 2.175 2.25 1.245 1.317 0.808 0.880
1-5/8 - - 2.686 2.805 2.35 2.438 1.364 1.416 0.868 0.944
1-3/4 5 - 2.893 3.031 2.538 2.625 1.460 1.540 0.929 1.009
1-7/8 - - 3.099 3.247 2.722 2.813 1.567 1.651 0.989 1.073
2 4.5 - 3.306 3.464 2.900 3 1.675 1.763 1.050 1.138
2-1/4 4.5 - 3.719 3.897 3.263 3.375 1.890 1.986 1.155 1.267
2-1/2 4 - 4.133 4.330 3.625 3.75 2.105 2.209 1.401 1.427
2-3/4 4 - 4.546 4.763 3.988 4.125 2.319 2.431 1.522 1.556
3 4 - 4.959 5.196 4.350 4.5 2.534 2.654 1.643 1.685
3-1/4 4 - 5.373 5.629 4.713 4.875 2.749 2.877 1.748 1.814
3-1/2 4 - 5.786 6.062 5.075 5.25 2.964 3.100 1.870 1.943
3-374 4 - 6.199 6.495 5.438 5.625 3.178 3.322 1.990 2.072
4 4 - 6.612 6.928 5.800 6 3.393 3.545 2.112 2.201

Reproduced by permission of DIN Deutsches Institut für Normung e. V. The definitive version for the implementation of this standard is the edition bearing the most recent date of issue, obtainable from Beuth Verlag GmbH, Burggrafenstraße 6, 10787 Berlin, Germany.
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