Finished Hex Nuts

  
 
A
H
W
Basic Size
Width Across Flats
Thickness
Across Corners
#
Min
Max
Min
Max
Min
Max
1/4
0.428
0.438
0.212
0.226
0.488
0.505
5/16
0.489
0.500
0.258
0.273
0.557
0.577
3/8
0.551
0.562
0.320
0.337
0.628
0.650
7/16
0.675
0.688
0.365
0.385
0.768
0.794
1/2
0.736
0.750
0.427
0.448
0.840
0.866
9/16
.861
0.875
0.473
0.496
0.982
1.010
5/8
0.922
0.938
0.535
0.559
1.051
1.083
3/4
1.088
1.125
0.617
0.665
1.240
1.299
7/8
1.269
1.312
0.724
0.776
1.447
1.516
1
1.450
1.500
0.831
0.887
1.653
1.732