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Finished Hex Nuts Dimensions & Specifications, Grade 2

Nominal or Basic Major Diameter of Thread
F
G
H
Width Across Flats
Width Across Corners
Thickness
Basic
Max
Min
Max
Min
Basic
Max
Min
1/4
0.2500
7/16
0.438
0.428
0.505
0.488
7/32
0.226
0.212
5/16
0.3125
1/2
0.500
0.489
0.577
0.557
17/64
0.273
0.258
3/8
0.3750
9/16
0.562
0.551
0.650
0.628
21/64
0.337
0.320
7/16
0.4375
11/16
0.688
0.675
0.794
0.768
3/8
0.385
0.365
1/2
0.5000
3/4
0.750
0.736
0.866
0.840
7/16
0.448
0.427
9/16
0.5625
7/8
0.875
0.861
1.010
0.982
31/64
0.496
0.473
5/8
0.6250
15/16
0.938
0.922
1.083
1.051
35/64
0.559
0.535
3/4
0.7500
1 1/8
1.125
1.088
1.299
1.240
41/64
0.665
0.617
7/8
0.8750
1 5/16
1.312
1.269
1.516
1.447
3/4
0.776
0.724
1
1.0000
1 1/2
1.500
1.450
1.732
1.653
55/64
0.887
0.831
1 1/8
1.1250
1 11/16
1.688
1.631
1.949
1.859
31/32
0.999
0.939
1 1/4
1.2500
1 7/8
1.875
1.812
2.165
2.066
1 1/16
1.094
1.030
1 3/8
1.3750
2 1/16
2.062
1.994
2.382
2.273
1 11/64
1.206
1.138
1 1/2
1.5000
21/4
2.250
2.175
2.598
2.480
1 9/32
1.317
1.245
1 5/8
1.6250
2 7/16
2.438
2.356
2.815
2.686
1 25/64
1.429
1.353
1 3/4
1.7500
2 5/8
2.625
2.538
3.031
2.893
1 1/2
1.540
1.460
2
2.0000
3
3.000
2.900
3.464
3.306
1 23/32
1.763
1.675
2 1/4
2.2500
3 3/8
3.375
3.263
3.897
3.719
1 15/16
1.986
1.890
2 1/2
2.5000
3 3/4
3.750
3.625
4.330
4.133
2 5/32
2.209
2.105
2 3/4
2.7500
4 1/8
4.125
3.988
4.763
4.546
2 3/8
2.431
2.319
3
3.0000
4 1/2
4.500
4.350
5.196
4.959
2 19/32
2.654
2.534
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