In this article, we show the heavy hex nuts dimensions according to the ASME B18.2.2 specification.

 

STEEL NUTS WIDTH ASME B18.2.2

 

Heavy Hex Nuts Dimensions ASME B18.2.2
Heavy Hex Nuts Dimensions ASME B18.2.2

 

HEAVY HEX NUTS DIAMETER (inches) 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
1⅛ 1.13/16 1.812 1.756 2.093 2.002
2 2.000 1.938 2.309 2.209
1⅜ 2.3/16 2.188 2.119 2.526 2.416
2.3/8 2.375 2.300 2.742 2.622
1⅝ 2.9/16 2.562 2.481 2.959 2.828
2.3/4 2.750 2.662 3.175 3.035
1⅞ 2.15/16 2.938 2.844 3.392 3.242
2 3.1/8 3.125 3.025 3.608 3.449
3.1/2 3.500 3.388 4.041 3.862
3.7/8 3.875 3.750 4.474 4.275
4.1/4 4.250 4.112 4.907 4.688
3 4.5/8 4.625 4.475 5.340 5.102
5 5.000 4.838 5.774 5.515
5.3/8 5.375 5.200 6.207 5.928
5.3/4 5.750 5.562 6.640 6.341
4 6.1/8 6.125 5.925 7.073 6.755

 

STEEL NUTS THICKNESS (THK.)

Heavy Hex Nuts Dimensions ASME B18.2.2
Heavy Hex Nuts Dimensions ASME B18.2.2
HEAVY HEX NUT DIAMETER (inches) Hex Heavy Nut Thickness
Basic Max Min
1/2 31/64 0.504 0.464
5/8 39/64 0.631 0.587
3/4 47/64 0.758 0.710
7/8 55/64 0.885 0.833
1 63/64 1.012 0.956
1⅛ 1.7/64 1.139 1.079
1.7/32 1.251 1.187
1⅜ 1.11/32 1.378 1.310
1.15/32 1.505 1.433
1⅝ 1.19/32 1.632 1.556
1.23/32 1.759 1.679
1⅞ 1.27/32 1.886 1.802
2 1.31/32 2.013 1.925
2.13/64 2.251 2.155
2.29/64 2.505 2.401
2.45/64 2.759 2.647
3 2.61/64 3.013 2.893
3.3/16 3.252 3.124
3.7/16 3.506 3.370
3.11/16 3.760 3.616
4 3.15/16 4.014 3.862

 

HEAVY HEX NUTS WEIGHT (in POUNDS)

Heavy Hex Nuts Diameter Finished Hex Heavy Hex Finished Jam Heavy Hex Jam Square Heavy Square
1/2″ 3.75 6.54 2.62 4 5.78 7.87
5/8″ 7.33 11.9 4.93 6.96 10.8 14.3
3/4″ 11.9 19.3 7.7 11 15.4 23.5
7/8″ 19 29.7 12 16.7 24.5 36.2
1″ 28.3 42.5 17.6 23.5 36.3 51.5
1-1/8″ 40.3 59.2 24.7 32.4 52.5 72.4
1-1/4″ 54.3 78.6 36.1 45.8 70.6 95.5
1-3/8″ 73 102 47.9 59.3 94.5 125
1-1/2″ 94.3 131 60.9 74.8 122 161
1-5/8″ 162 91.6
1-3/4″ 151 204 100 114
1-7/8″ 241 134
2″ 224 299 140 165
2-1/4″ 419 227
2-1/2″ 564 332
2-3/4″ 738 429
3″ 950 545
3-1/4″ 1194 651
3-1/2″ 1526 851
3-3/4″ 1812 1005
4″ 2180 1200

The weight of heavy hexagonal steel nuts for stud bolts in lbs / 100 units – ASME B18.2.2

 

HEAVY HEX NUTS WEIGHT (in KILOGRAMS)

Heavy Hex Nuts Diameter Finished Hex Heavy Hex Finished Jam Heavy Hex Jam Square Heavy Square
1/2″ 1.70 2.97 1.19 1.81 2.62 3.57
5/8″ 3.32 5.40 2.24 3.16 4.90 6.49
3/4″ 5.40 8.75 3.49 4.99 6.98 10.66
7/8″ 8.62 13.47 5.44 7.57 11.11 16.42
1″ 12.83 19.27 7.98 10.66 16.46 23.36
1-1/8″ 18.28 26.85 11.20 14.69 23.81 32.83
1-1/4″ 24.63 35.65 16.37 20.77 32.02 43.31
1-3/8″ 33.11 46.26 21.72 26.89 42.86 56.69
1-1/2″ 42.77 59.41 27.62 33.92 55.33 73.01
1-5/8″ 0.00 73.47 0.00 41.54
1-3/4″ 68.48 92.51 45.35 51.70
1-7/8″ 0.00 109.29 0.00 60.77 0.00
2″ 101.58 135.60 63.49 74.83 0.00
2-1/4″ 190.02 0.00 102.94 0.00
2-1/2″ 255.77 0.00 150.56 0.00
2-3/4″ 334.68 0.00 194.55 0.00
3″ 430.83 0.00 247.16 0.00
3-1/4″ 541.48 0.00 295.23 0.00
3-1/2″ 692.04 0.00 385.93 0.00
3-3/4″ 821.74 0.00 455.77 0.00
4″ 988.63 0.00 544.20
The weight of heavy hexagonal steel nuts for stud bolts in kilograms / 100 units – ASME B18.2.2

METRIC BOLTS AND NUTS WEIGTH IN KILOGRAMS

Heavy Hex Nuts Diameter (Metric) Bolt Weight (kg) Nut Weight (kg) Total Weight (kg)
M12 x 35 0.049 0.013 0.062
M12 x 40 0.053 0.013 0.066
M12 x 45 0.058 0.013 0.071
M12 x 50 0.062 0.013 0.075
M12 x 55 0.067 0.013 0.080
M12 x 60 0.071 0.013 0.084
M12 x 65 0.072 0.013 0.085
M12 x 70 0.080 0.013 0.093
M12 x 75 0.085 0.013 0.098
M12 x 80 0.089 0.013 0.102
M12 x 85 0.094 0.013 0.107
M12 x 90 0.098 0.013 0.111
M12 x 95 0.103 0.013 0.116
M12 x 100 0.107 0.013 0.120
M12 x 105 0.111 0.013 0.124
M12 x 110 0.116 0.013 0.129
M 16X35 0.087 0.032 0.119
M 16X40 0.094 0.032 0.126
M 16X45 0.102 0.032 0.134
M 16X50 0.110 0.032 0.142
M 16X55 0.118 0.032 0.150
M 16X60 0.126 0.032 0.158
M 16X65 0.132 0.032 0.164
M 16X70 0.141 0.032 0.173
M 16X75 0.148 0.032 0.180
M 16X80 0.153 0.032 0.185
M 16X85 0.161 0.032 0.193
M 16X90 0.167 0.032 0.199
M 16X95 0.177 0.032 0.209
M 16X100 0.186 0.032 0.218
M 16X105 0.195 0.032 0.227
M 16X110 0.203 0.032 0.235
M 16X115 0.211 0.032 0.243
M 16X120 0.220 0.032 0.252
M 16X125 0.228 0.032 0.260
M 16X130 0.235 0.032 0.267
M 16X135 0.243 0.032 0.275
M 16X140 0.251 0.032 0.283
M 16X145 0.259 0.032 0.291
M 16X150 0.267 0.032 0.299
M 16X155 0.270 0.032 0.302
M 16X160 0.278 0.032 0.310
M 16X165 0.286 0.032 0.318
M 16X170 0.294 0.032 0.326
M 16X175 0.302 0.032 0.334
M 16X180 0.310 0.032 0.342
M 16X185 0.318 0.032 0.350
M 16X190 0.326 0.032 0.358
M 16X195 0.334 0.032 0.366
M 16X200 0.342 0.032 0.374
M 20X45 0.173 0.061 0.234
M 20X50 0.186 0.061 0.247
M 20X55 0.198 0.061 0.259
M 20X60 0.211 0.061 0.272
M 20X65 0.223 0.061 0.284
M 20X70 0.235 0.061 0.296
M 20X75 0.248 0.061 0.309
M 20X80 0.260 0.061 0.321
M 20X85 0.273 0.061 0.334
M 20X90 0.285 0.061 0.346
M 20X95 0.297 0.061 0.358
M 20X100 0.310 0.061 0.371
M 20X105 0.322 0.061 0.383
M 20X110 0.334 0.061 0.395
M 20X115 0.346 0.061 0.407
M 20X120 0.359 0.061 0.420
M 20X125 0.371 0.061 0.432
M 20X130 0.384 0.061 0.445
M 20X135 0.396 0.061 0.457
M 20X140 0.408 0.061 0.469
M 20X145 0.421 0.061 0.482
M 20X150 0.433 0.061 0.494
M 20X155 0.445 0.061 0.506
M 20X160 0.458 0.061 0.519
M 20X165 0.470 0.061 0.531
M 20X170 0.482 0.061 0.543
M 20X175 0.495 0.061 0.556
M 20X180 0.506 0.061 0.445
M 20X185 0.518 0.061 0.457
M 20X190 0.530 0.061 0.469
M 20X195 0.542 0.061 0.481
M 20X200 0.554 0.061 0.493
M 24X45 0.258 0.104 0.362
M 24X50 0.276 0.104 0.380
M 24X55 0.294 0.104 0.398
M 24X60 0.312 0.104 0.416
M 24X65 0.330 0.104 0.434
M 24X70 0.348 0.104 0.452
M 24X75 0.366 0.104 0.470
M 24X80 0.384 0.104 0.488
M 24X85 0.402 0.104 0.506
M 24X90 0.420 0.104 0.524
M 24X95 0.437 0.104 0.541
M 24X100 0.456 0.104 0.560
M 24X105 0.471 0.104 0.575
M 24X110 0.492 0.104 0.596
M 24X115 0.510 0.104 0.614
M 24X120 0.528 0.104 0.632
M 24X125 0.546 0.104 0.650
M 24X130 0.559 0.104 0.663
M 24X135 0.582 0.104 0.686
M 24X140 0.598 0.104 0.702
M 24X145 0.618 0.104 0.722
M 24X150 0.638 0.104 0.742
M 24X155 0.656 0.104 0.760
M 24X160 0.674 0.104 0.778
M 24X165 0.688 0.104 0.792
M 24X170 0.709 0.104 0.813
M 24X175 0.727 0.104 0.831
M 24X180 0.745 0.104 0.849
M 24X185 0.762 0.104 0.866
M 24X190 0.78 0.104 0.884
M 24X195 0.798 0.104 0.902
M 24X200 0.816 0.104 0.920