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Reference Tables -- Hex Nut Dimensions

 



Heavy Hex Nut Dimension Heavy Hex Nut Side Heavy Thin Hex Nut

Dimensions for Finished Hex Nuts, Hex Jam Nuts
and Two Way Reversible Lock Nuts

Nominal
Or
Basic Major Dia of Thread
F G H H1
Width Across Flats Width Across Corners Thickness Hex Nuts & Reversible Lock Nuts Thickness Hex
Jam Nuts
Basic Max Min Max Min Basic Max Mmin Basic Max Min
8
0.1640
10
0.1900
1/4
0.2500
5/16
0.3125
11/32
3/8
7/16
1/2
0.344
0.375
0.438
0.500
0.332
0.362
0.428
0.489
0.397
0.433
0.505
0.577
0.378
0.413
0.488
0.557
--
--
7/32
17/64
0.203
0.203
0.226
0.273
0.187
0.187
0.212
0.258
--
--
5/32
3/16
--
--
0.164
0.195
--
--
0.150
0.180
3/8
0.3750
7/16
0.4375
1/2
0.5000
9/16
0.5625
9/16
11/16
3/4
7/8
0.562
0.688
0.750
0.875
0.551
0.675
0.736
0.861
0.650
0.794
0.866
1.010
0.628
0.768
0.840
0.982
21/64
3/8
7/16
31/64
0.337
0.385
0.448
0.496
0.320
0.365
0.427
0.473
7/32
1/4
5/16
5/16
0.227
0.260
0.323
0.324
0.210
0.240
0.302
0.301
5/8
0.6250
3/4
0.7500
7/8
0.8750
1
1.0000
15/16
1-1/8
1-5/16
1-1/2
0.938
1.125
1.312
1.500
0.922
1.088
1.269
1.450
1.083
1.299
1.516
1.732
1.051
1.240
1.447
1.653
35/64
41/64
3/4
55/64
0.559
0.665
0.776
0.887
0.535
0.617
0.724
0.831
3/8
27/64
31/64
35/64
0.387
0.446
0.510
0.575
0.363
0.398
0.458
0.519
1-1/8
1.1250
1-1/4
1.2500
1-3/8
1.3750
1-1/2
1.5000
1-11/16
1-7/8
2-1/16
2-1/4
1.688
1.875
2.062
2.250
1.631
1.812
1.994
2.175
1.949
2.165
2.382
2.598
1.859
2.066
2.273
2.480
31/32
1-1/6
1-11/64
1-9/32
0.999
1.094
1.206
1.317
0.939
1.030
1.138
1.245
39/64
23/32
25/32
27/32
0.639
0.751
0.815
0.880
0.579
0.687
0.747
0.808
1-5/8
1.6250
1-3/4
1.7500
2
2.0000
2-1/4
2.2500
2-7/16
2-5/8
3
3-3/8
2.438
2.625
3.000
3.375
2.356
2.538
2.900
3.263
2.815
3.031
3.464
3.897
2.686
2.893
3.306
3.719
1-25/64
1-1/2
1-23/32
1-15/16
1.429
1.540
1.763
1.986
1.353
1.460
1.675
1.890
29/32
31/32
1-3/32
1-7/32
0.945
1.009
1.138
1.267
0.869
0.929
1.050
1.171
2-1/2
2.5000
2-3/4
2.7500
3
3.0000
3-3/4
4-1/8
4-1/2
3.750
4.125
4.500
3.625
3.988
4.350
4.330
4.763
5.196
4.133
4.546
4.959
2-5/32
2-3/8
2-19/32
2.209
2.431
2.654
2.105
2.319
2.534
1-11/32
1-15/32
1-19/32
1.396
1.525
1.654
1.292
1.413
1.534

 

 

 

 

 


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