Heavy Hex Nuts
Heavy hex nuts are slightly larger and thicker than standard hex nuts. There are numerous grades and the heavy pattern is typically used for large diameter and high strength bolts. See our nut compatibility chart to determine the compatible heavy hex nut(s) for a specific grade of bolt. Since hot-dip galvanizing typically adds 2.2 to 5 mils of thickness to the threaded portion of a fastener, galvanized heavy hex nuts are tapped oversize to compensate for the corrosion resistant coating on the bolts.
Stock
Diameters: 3/8" - 2-3/4"
Origin: Domestic and import
Finish: Black and hot-dip galvanized
Grades: A563 (grades A, C, and DH), A194 grade 2H
Dimensions
Nominal Size
F
C
H
Weight
Per Nut
Width Across Flats
Width Across Corners
Thickness
Basic
Max
Min
Max
Min
Basic
Max
Min
3/8
11/16
0.688
0.669
0.794
0.763
23/64
0.377
0.341
0.03
1/2
7/8
0.875
0.850
1.010
0.969
31/64
0.504
0.464
0.07
5/8
1-1/16
1.062
1.031
1.227
1.175
39/64
0.631
0.587
0.12
3/4
1-1/4
1.250
1.212
1.443
1.382
47/64
0.758
0.710
0.20
7/8
1-7/16
1.438
1.394
1.660
1.589
55/64
0.885
0.833
0.30
1
1-5/8
1.625
1.575
1.876
1.796
63/64
1.012
0.956
0.43
1-1/8
1-13/16
1.812
1.756
2.093
2.002
1-7/64
1.139
1.079
0.59
1-1/4
2
2.000
1.938
2.309
2.209
1-7/32
1.251
1.187
0.79
1-3/8
2-3/16
2.188
2.119
2.526
2.416
1-11/32
1.378
1.310
1.02
1-1/2
2-3/8
2.375
2.300
2.742
2.622
1-15/32
1.505
1.433
1.31
1-5/8
2-9/16
2.562
2.481
2.959
2.828
1-19/32
1.632
1.556
1.62
1-3/4
2-3/4
2.750
2.662
3.175
3.035
1-23/32
1.759
1.679
2.04
1-7/8
2-15/16
2.938
2.844
3.392
3.242
1-27/32
1.886
1.802
2.41
2
3-1/8
3.125
3.025
3.608
3.449
1-31/32
2.013
1.925
2.99
2-1/4
3-1/2
3.500
3.388
4.041
3.862
2-13/64
2.251
2.155
4.19
2-1/2
3-7/8
3.875
3.750
4.474
4.275
2-29/64
2.505
2.401
5.64
2-3/4
4-1/4
4.250
4.112
4.907
4.688
2-45/64
2.759
2.647
7.38
3
4-5/8
4.625
4.475
5.340
5.102
2-61/64
3.013
2.893
9.50
3-1/4
5
5.000
4.838
5.774
5.515
3-3/16
3.252
3.124
11.94
3-1/2
5-3/8
5.375
5.200
6.207
5.928
3-7/16
3.506
3.370
15.26
3-3/4
5-3/4
5.750
5.562
6.640
6.341
3-11/16
3.760
3.616
18.12
4
6-1/8
6.125
5.925
7.073
6.755
3-15/16
4.014
3.862
21.80
Dimensions per ASME B18.2.2 1987 (1999)
 



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A194 2H/2HM / A563
A194 2H/2HM / A563 Heavy Hex Nuts
Date:2013-09-29  Model:
Heavy Hex Nuts
Heavy hex nuts are slightly larger and thicker than standard hex nuts. There are numerous grades and the heavy pattern is typically used for large diameter and high strength bolts. See our nut compatibility chart to determine the compatible heavy hex nut(s) for a specific grade of bolt. Since hot-dip galvanizing typically adds 2.2 to 5 mils of thickness to the threaded portion of a fastener, galvanized heavy hex nuts are tapped oversize to compensate for the corrosion resistant coating on the bolts.
Stock
Diameters: 3/8" - 2-3/4"
Origin: Domestic and import
Finish: Black and hot-dip galvanized
Grades: A563 (grades A, C, and DH), A194 grade 2H
Dimensions
Nominal Size
F
C
H
Weight
Per Nut
Width Across Flats
Width Across Corners
Thickness
Basic
Max
Min
Max
Min
Basic
Max
Min
3/8
11/16
0.688
0.669
0.794
0.763
23/64
0.377
0.341
0.03
1/2
7/8
0.875
0.850
1.010
0.969
31/64
0.504
0.464
0.07
5/8
1-1/16
1.062
1.031
1.227
1.175
39/64
0.631
0.587
0.12
3/4
1-1/4
1.250
1.212
1.443
1.382
47/64
0.758
0.710
0.20
7/8
1-7/16
1.438
1.394
1.660
1.589
55/64
0.885
0.833
0.30
1
1-5/8
1.625
1.575
1.876
1.796
63/64
1.012
0.956
0.43
1-1/8
1-13/16
1.812
1.756
2.093
2.002
1-7/64
1.139
1.079
0.59
1-1/4
2
2.000
1.938
2.309
2.209
1-7/32
1.251
1.187
0.79
1-3/8
2-3/16
2.188
2.119
2.526
2.416
1-11/32
1.378
1.310
1.02
1-1/2
2-3/8
2.375
2.300
2.742
2.622
1-15/32
1.505
1.433
1.31
1-5/8
2-9/16
2.562
2.481
2.959
2.828
1-19/32
1.632
1.556
1.62
1-3/4
2-3/4
2.750
2.662
3.175
3.035
1-23/32
1.759
1.679
2.04
1-7/8
2-15/16
2.938
2.844
3.392
3.242
1-27/32
1.886
1.802
2.41
2
3-1/8
3.125
3.025
3.608
3.449
1-31/32
2.013
1.925
2.99
2-1/4
3-1/2
3.500
3.388
4.041
3.862
2-13/64
2.251
2.155
4.19
2-1/2
3-7/8
3.875
3.750
4.474
4.275
2-29/64
2.505
2.401
5.64
2-3/4
4-1/4
4.250
4.112
4.907
4.688
2-45/64
2.759
2.647
7.38
3
4-5/8
4.625
4.475
5.340
5.102
2-61/64
3.013
2.893
9.50
3-1/4
5
5.000
4.838
5.774
5.515
3-3/16
3.252
3.124
11.94
3-1/2
5-3/8
5.375
5.200
6.207
5.928
3-7/16
3.506
3.370
15.26
3-3/4
5-3/4
5.750
5.562
6.640
6.341
3-11/16
3.760
3.616
18.12
4
6-1/8
6.125
5.925
7.073
6.755
3-15/16
4.014
3.862
21.80
Dimensions per ASME B18.2.2 1987 (1999)
 



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