Dimensions of Heavy Hex Nuts ASME B18.2.2 used with Stud Bolts ASME B16.5



Heavy Hex Nuts

SIZE Width
Across Flats
Width
Across Corners
F C
Basic Max Min Max Min
1/2 7/8 0.875 0.850 1.010 0.969
5/8 1.1/16 1.062 1.031 1.227 1.175
3/4 1.1/4 1.250 1.212 1.443 1.382
7/8 1.7/16 1.438 1.394 1.660 1.589
1 1.5/8 1.625 1.575 1.876 1.796
1.1/8 1.13/16 1.812 1.756 2.093 2.002
1.1/4 2 2.000 1.938 2.309 2.209
1.3/8 2.3/16 2.188 2.119 2.526 2.416
1.1/2 2.3/8 2.375 2.300 2.742 2.622
1.5/8 2.9/16 2.562 2.481 2.959 2.828
1.3/4 2.3/4 2.750 2.662 3.175 3.035
1.7/8 2.15/16 2.938 2.844 3.392 3.242
2 3.1/8 3.125 3.025 3.608 3.449
2.1/4 3.1/2 3.500 3.388 4.041 3.862
2.1/2 3.7/8 3.875 3.750 4.474 4.275
2.3/4 4.250 4.112 4.907 4.688
3 4.5/8 4.625 4.475 5.340 5.102
3.1/4 5 5.000 4.838 5.774 5.515
3.1/2 5.3/8 5.375 5.200 6.207 5.928
3.3/4 5.3/4 5.750 5.562 6.640 6.341
4 6.1/8 6.125 5.925 7.073 6.755

Heavy Hex Nuts

SIZE Thickness Nuts
T
Basic Max Min
1/2 31/64 0.504 0.464 22
mm
22.23
mm
5/8 39/64 0.631 0.587 27
mm
26.99
mm
3/4 47/64 0.758 0.710 32
mm
31.75
mm
7/8 55/64 0.885 0.833 36
mm
36.51
mm
1 63/64 1.012 0.956 41
mm
41.28
mm
1.1/8 1.7/64 1.139 1.079 46
mm
46.04
mm
1.1/4 1.7/32 1.251 1.187 51
mm
50.8
mm
1.3/8 1.11/32 1.378 1.310 56
mm
55.56
mm
1.1/2 1.15/32 1.505 1.433 60
mm
60.33
mm
1.5/8 1.19/32 1.632 1.556 65
mm
65.09
mm
1.3/4 1.23/32 1.759 1.679 70
mm
69.85
mm
1.7/8 1.27/32 1.886 1.802 75
mm
74.61
mm
2 1.31/32 2.013 1.925 79
mm
79.37
mm
2.1/4 2.13/64 2.251 2.155 89
mm
88.9
mm
2.1/2 2.29/64 2.505 2.401 98
mm
98.42
mm
2.3/4 2.45/64 2.759 2.647 108
mm
107.95
mm
3 2.61/64 3.013 2.893 117
mm
117.48
mm
3.1/4 3.3/16 3.252 3.124 127
mm
127
mm
3.1/2 3.7/16 3.506 3.370 137
mm
136.53
mm
3.3/4 3.11/16 3.760 3.616 146
mm
146.05
mm
4 3.15/16 4.014 3.862 156
mm
155.57
mm

Notes:


Important: the Across Flat sizes in Millimeters shown in the table should be used as a guide only. Individual sizes should be checked before specifying any equipment.