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Nut dimensions

Internal Threads - Class 2B

Nominal Size &
Threads / Inch &
Series Designation		 Allow-
ance		 Minor
Diameter		 Pitch
Diameter		 Major
Diameter
Min. Max. Min. Max. Tolerance Min.
0-80
1-64
1-72
2-56
2-64		 UNF
UNC
UNF
UNC
UNF		 0.0005
0.0006
0.0006
0.0006
0.0006		 0.0465
0.0561
0.0580
0.0667
0.0691		 0.0514
0.0623
0.0635
0.0737
0.0753		 0.0519
0.0629
0.0640
0.0744
0.0759		 0.0542
0.0655
0.0665
0.0772
0.0786		 0.0023
0.0026
0.0025
0.0028
0.0027		 0.0600
0.0730
0.0730
0.0860
0.0860
3-48
3-56
4-40
4-48
5-40		 UNC
UNF
UNC
UNF
UNC		 0.0007
0.0007
0.0008
0.0007
0.0008		 0.0764
0.0797
0.0849
0.0894
0.0979		 0.0845
0.0865
0.0939
0.0968
0.1062		 0.0855
0.0874
0.0958
0.0985
0.1088		 0.0885
0.0902
0.0991
0.1016
0.1121		 0.0030
0.0028
0.0033
0.0031
0.0033		 0.0990
0.0990
0.1120
0.1120
0.1250
5-44
6-32
6-40
8-32
8-36		 UNF
UNC
UNF
UNC
UNF		 0.0007
0.0008
0.0008
0.0009
0.0008		 0.1004
0.104
0.111
0.130
0.134		 0.1079
0.114
0.119
0.139
0.142		 0.1102
0.1177
0.1218
0.1437
0.1460		 0.1134
0.1214
0.1252
0.1475
0.1496		 0.0032
0.0037
0.0034
0.0038
0.0036		 0.1250
0.1380
0.1380
0.1640
0.1640
10-24
10-32
12-24
12-28
1/4-20		 UNC
UNF
UNC
UNF
UNC		 0.0010
0.0009
0.0010
0.0010
0.0011		 0.145
0.156
0.171
0.177
0.196		 0.156
0.164
0.181
0.186
0.207		 0.1629
0.1697
0.1889
0.1928
0.2175		 0.1672
0.1736
0.1933
0.1970
0.2224		 0.0043
0.0039
0.0044
0.0042
0.0049		 0.1900
0.1900
0.2160
0.2160
0.2500
1/4-28
5/16-18
5/16-24
3/8-16
3/8-24		 UNF
UNC
UNF
UNC
UNF		 0.0010
0.0012
0.0011
0.0013
0.0011		 0.211
0.252
0.267
0.307
0.330		 0.220
0.265
0.277
0.321
0.034		 0.2268
0.2764
0.2854
0.3344
0.3479		 0.2311
0.2817
0.2902
0.3401
0.3528		 0.0043
0.0053
0.0048
0.0057
0.0049		 0.2500
0.3125
0.3125
0.3750
0.3750
7/16-14
7/16-20
1/2-13
1/2-20
9/16-12		 UNC
UNF
UNC
UNF
UNC		 0.0014
0.0013
0.0015
0.0013
0.0016		 0.360
0.383
0.417
0.446
0.472		 0.376
0.395
0.434
0.457
0.490		 0.3911
0.4050
0.4500
0.4675
0.5084		 0.3972
0.4104
0.4565
0.4731
0.5152		 0.0061
0.0054
0.0065
0.0056
0.0068		 0.4375
0.4375
0.5000
0.5000
0.5625
9/16-18
5/8-11
5/8-18
3/4-10
3/4-16		 UNF
UNC
UNF
UNC
UNF		 0.0014
0.0016
0.0014
0.0018
0.0015		 0.502
0.527
0.565
0.642
0.682		 0.515
0.546
0.578
0.663
0.696		 0.5264
0.5660
0.5889
0.6850
0.7094		 0.5323
0.5732
0.5949
0.6927
0.7159		 0.0059
0.0072
0.0060
0.0077
0.0065		 0.5625
0.6250
0.6250
0.7500
0.7500
7/8-9
7/8-14
1-8
1-12
1-14		 UNC
UNF
UNC
UNF
UNS		 0.0019
0.0016
0.0020
0.0018
0.0017		 0.755
0.798
0.865
0.910
0.923		 0.778
0.814
0.890
0.928
0.938		 0.8028
0.8286
0.9188
0.9459
0.9536		 0.8110
0.8356
0.9276
0.9535
0.9609		 0.0082
0.0070
0.0088
0.0076
0.0073		 0.8750
0.8750
1.0000
1.0000
1.0000
11/8-7
11/8-8
11/812
11/4-7
11/4-8		 UNC
UN
UNF
UNC
UN		 0.0022
0.0021
0.0018
0.022
0.0021		 0.970
0.990
1.035
1.095
1.115		 0.998
1.015
1.053
1.123
1.140		 1.322
1.0438
1.0709
1.1572
1.1688		 1.0416
0.0528
1.0787
1.668
1.1780		 0.0094
0.0090
0.0078
0.0096
0.0092		 1.1250
1.1250
1.1250
1.2500
1.2500
11/4-12
1 3/8-6
1 3/8-8
1 3/8-12
11/2-6		 UNF
UNC
UN
UNF
UNC		 0.0018
0.0024
0.0022
0.0019
0.0024		 1.160
1.195
1.240
1.285
1.320		 1.178
1.225
1.265
1.303
1.350		 1.1959
1.2667
1.2938
1.3209
1.3917		 1.2039
1.2771
1.3031
1.3291
1.4022		 0.0080
0.0104
0.0093
0.0082
0.0105		 1.2500
1.3750
1.3750
1.3750
1.5000
11/2-8
11/2-12
1 5/8-8
1 3/4-5
1 3/4-8		 UN
UNC
UN
UNC
UN		 0.0022
0.0019
0.0022
0.0027
0.0023		 1.365
1.410
1.490
1.534
1.615		 1.390
1.428
1.515
1.568
1.640		 1.4188
1.4459
1.5438
1.6201
1.6688		 1.4283
1.4542
1.5535
1.6317
1.6786		 0.0095
0.0083
0.0097
0.0116
0.0098		 1.5000
1.5000
1.6250
1.7500
1.7500
1 7/8-8
2-41/2
2-8
2 1/4-4.5
2 1/4-8		 UN
UNC
UN
UNC
UN		 0.0023
0.0029
0.0023
0.0029
0.0024		 1.740
1.759
1.865
2.009
2.115		 1.765
1.795
1.890
2.045
2.140		 1.7938
1.8557
1.9188
2.1057
2.1688		 1.8038
1.8681
1.9289
2.1183
2.1792		 0.0100
0.0124
0.0101
0.0126
0.0104		 1.8750
2.0000
2.0000
2.2500
2.2500
2 1/2-4
2 1/2-8
2 3/4-4
2 3/4-8
3-4		 UNC
UN
UNC
UN
UNC		 0.0031
0.0024
0.0032
0.0025
0.0032		 2.229
2.365
2.479
2.615
2.729		 2.267
2.390
2.517
2.640
2.767		 2.3376
2.4188
2.5876
2.6688
2.8376		 2.3511
2.4294
2.6013
2.6796
2.8515		 0.0135
0.0106
0.0137
0.0108
0.0139		 2.5000
2.5000
2.7500
2.7500
3.0000
3-8
3 1/4-4
31/4-8
3 1/2-4
31/2-8		 UN
UNC
UN
UNC
UN		 0.0026
0.0033
0.0026
0.0033
0.0026		 2.865
2.979
3.115
3.229
3.365		 2.890
3.017
3.140
3.267
3.390		 2.9188
3.0876
3.1688
3.3376
3.4188		 2.9299
3.1017
3.1801
3.3519
3.4303		 0.0111
0.0141
0.0113
0.0143
0.0115		 3.0000
3.2500
3.2500
3.5000
3.5000
3 3/4-4
3 3/4-8
4-4
4-8		 UNC
UN
UNC
UN		 0.0034
0.0027
0.0034
0.0027		 3.479
3.615
3.729
3.865		 3.517
3.640
3.767
3.890		 3.5876
3.6688
3.8376
3.9188		 3.6021
3.6805
3.8523
3.9307		 0.0145
0.0117
0.0147
0.0119		 3.7500
3.7500
4.0000
4.0000

Two Piece Hex Cap Nuts

Size Across the Flats Overall Hght.
6-32
8-32
10-24
10-32
1/4-20
5/16-18
3/8-16
1/2-13
5/8-11		 5/16
5/16
3/8
3/8
7/16
9/16
5/8
3/4
15/16		 1/4
1/4
9/32
11/32
21/64
3/8
27/64
9/16
51/64
Two Piece Hex Cap Nuts

Hex Coupling Nuts

Nom
Size or Basic
Major Dia. of Thread		 F G H
Width Across
Flats		 Width
Across
Corners		 Length
Basic Max Min Max Min Basic Max Min
1/4
5/16
3/8
1/2
5/8
3/4
1		 0.2500
0.3125
0.3750
0.5000
0.6250
0.7500
1.0000		 3/8
1/2
9/16
3/4
15/16
1-1/8
1-1/2		 0.375
0.500
0.562
0.750
0.938
1.125
1.500		 0.365
0.489
0.551
0.736
0.922
1.088
1.450		 0.433
0.577
0.650
0.866
1.083
1.299
1.732		 0.416
0.557
0.628
0.839
1.051
1.240
1.653		 3/4
15/16
1-1/8
1-1/2
1-7/8
2-1/4
3		 0.76
0.95
1.13
1.51
1.89
2.27
3.03		 0.74
0.93
1.11
1.49
1.86
2.22
2.97
Hex Coupling Nuts

Hex Castle Nuts

Nominal Size
or
Basic Major Dia.
of Thread		 F G H T S R W Runout of
Bearing
Surface
FIR
Width Across
Flats		 Width Across
Corners		 Thickness Unslotted Thickness
and
Height of Flat		 Width of
Slot		 Radius
of
Filet		 Dia of
Cylindrical
Basic Max Min Max Min Basic Max Min Nom Max Min Max Min + .010 Min Max
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		 23/32
13/16
29/32
1		 0.731
0.827
0.922
1.018		 0.706
0.798
0.890
0.982		 1/2
9/16
21/32
23/32		 0.51
0.57
0.67
0.73		 0.49
0.55
0.64
0.70		 0.24
0.24
0.24
0.30		 0.18
0.18
0.18
0.24		 0.156
0.188
0.188
0.188		 0.797
0.941
1.097
1.254		 0.021
0.023
0.025
0.027

T- Nuts, Straight Barrel

T-Nuts, Straight Barrel
Thread Size G H F A T Drill
Size		 LBS Per M Pcs.
Flange Dia. Barrel Height Barrel
Diam.		 Prong Height Material Thickness
10 - 24
10 - 24		 3/4
3/4		 5/16
5/16		 .243
.243		 7/32
7/32		 .040
.040		 1/4
1/4		 7
7
10-32
10-32		 3/4
3/4		 5/16
5/16		 .243
.243		 7/32
7/32		 .040
.040		 1/4
1/4		 7
7
1/4 - 20
1/4 - 20		 3/4
3/4		 5/16
5/16		 .305
.305		 7/32
7/32		 .047
.047		 5/16
5/16		 9
9
1/4 - 20
1/4 - 20		 3/4
3/4		 7/16
7/16		 .305
.305		 5/16
1/4		 .047
.047		 5/16
5/16		 9
9
5/16 - 18
5/16 - 18
5/16 - 18		 7/8
7/8
7/8		 3/8
3/8
5/8		 .390
.390
.390		 1/4
1/4
5/16		 .063
.063
.063		 25/64
25/64
25/64		 14
14
18
3/8 - 16 1 7/16 .440 11/32 .063 29/64 19

Wing Nuts - Cold Forged

Cold Forged Wing Nuts
Nominal
Size or Basic
Major Diameter
0f Thread		 Threads
per Inch		 A B C D E F
Wing
Spread		 Wing
Height		 Wing
Thickness		 Between
Wings		 Boss
Diameter		 Boss
Height
Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min.
6 0.1380
8 0.1640
10 0.1900
1/4 0.2500
5/16 0.3125
3/8 0.3750
1/2 0.5000
5/8 0.6250
3/4 0.7500
32
32
24 & 32
20
18
16
13
11
10		 0.72
0.91
0.91
1.10
1.25
1.44
1.94
2.76
2.76		 0.59
0.78
0.78
0.97
1.12
1.31
1.81
2.62
2.62		 0.41
0.47
0.47
0.57
0.66
0.79
1.00
1.44
1.44		 0.28
0.34
0.34
0.43
0.53
0.65
0.87
1.31
1.31		 0.11
0.14
0.14
0.18
0.21
0.24
0.33
0.40
0.40		 0.07
0.10
0.10
0.14
0.17
0.20
0.26
0.34
0.34		 0.21
0.27
0.27
0.39
0.39
0.48
0.65
0.90
0.90		 0.17
0.22
0.22
0.26
0.32
0.42
0.54
0.80
0.80		 0.33
0.43
0.45
0.50
0.58
0.70
0.93
1.19
1.19		 0.29
0.39
0.39
0.45
0.51
0.64
0.86
1.13
1.13		 0.14
0.18
0.18
0.22
0.25
0.30
0.39
0.55
0.55		 0.10
0.14
0.14
0.17
0.20
0.26
0.35
0.51
0.51

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

Finished Hex Nuts
Nominal
Or
Basic Major Dia of Thread		 F G H H1
Width Across Flats Width Across Comers 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 2.00000
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

Heavy Hex Nuts

Heavy Hex Nuts
Nominal Size or
Basic Major Dia. of Thread		 F G H
Width Across
Flats		 Width Across
Corners		 Thickness
Heavy Hex Nuts
Basic Max. Min. Max. Min. Basic Max. Min.
1/4 0.2500
5/16 0.3125
3/8 0.3750
7/16 0.4375
1/2
9/16
11/16
3/4		 0.500
0.562
0.688
0.750		 0.488
0.546
0.669
0.728		 0.577
0.650
0.794
0.866		 0.556
0.622
0.763
0.830		 15/64
19/64
23/64
27/64		 0.250
0.314
0.377
0.441		 0.218
0.280
0.341
0.403
1/2 0.5000
9/16 0.5625
5/8 0.6250
3/4 0.7500
7/8
15/16
1-1/16
1-1/4		 0.875
0.938
1.062
1.250		 0.850
0.909
1.031
1.212		 1.010
1.083
1.227
1.443		 0.969
1.037
1.175
1.382		 31/64
35/64
39/64
47/64		 0.504
0.568
0.631
0.758		 0.464
0.526
0.587
0.710
7/8 0.8750
1 1.0000
1-1/8 1.1250
1-1/4 1.2500
1-7/16
1-5/8
1-13/16
2		 1.438
1.625
1.812
2.000		 1.394
1.575
1.756
1.938		 1.660
1.876
2.093
2.309		 1.589
1.796
2.002
2.209		 55/64
63/64
1-7/64
1-7/32		 0.885
1.012
1.139
1.251		 0.833
0.956
1.079
1.187
1-3/8 1.3750
1-1/2 1.5000
1-5/8 1.6250
1-3/4 1.7500
2-3/16
2-3/8
2-9/16
2-3/4		 2.188
2.375
2.562
2.750		 2.119
2.300
2.481
2.662		 2.526
2.742
2.959
3.175		 2.416
2.622
2.828
3.035		 1-11/32
1-15/32
1-19/32
1-23/32		 1.378
1.505
1.632
1.759		 1.310
1.433
1.556
1.679
1-7/8 1.8750
2 2.0000
2-1/4 2.2500
2-1/2 2.5000
2-15/16
3-1/8
3-1/2
3-7/8		 2.938
3.125
3.500
3.875		 2.844
3.025
3.388
3.750		 3.392
3.608
4.041
4.474		 3.242
3.449
3.862
4.275		 1-27/32
1-31/32
2-13/64
2-29/64		 1.886
2.013
2.251
2.505		 1.802
1.925
2.155
2.401
2-3/4 2.7500
3 3.0000
3-1/4 3.2500
3-1/2 3.5000
4-1/4
4-5/8
5
5-3/8		 4.250
4.625
5.000
5.375		 4.112
4.475
4.838
5.200		 4.907
5.340
5.774
6.207		 4.688
5.102
5.515
5.928		 2-45/64
2-61/64
3-3/16
3-7/16		 2.759
3.013
3.252
3.506		 2.647
2.893
3.124
3.370
3-3/4 3.7500
4 4.000
5-3/4
6-1/8		 5.750
6.125		 5.562
5.925		 6.640
7.073		 6.341
6.755		 3-11/16
3-15/16		 3.760
4.014		 3.616
3.862

Hex Slotted Nuts

Hex Slotted Nuts
Normal Size or
Basic Major Dia of Thread		 F G H T S Runout Of
Bearing
Surface
FIM
Width Across Flats Width Across Corners Thickness Unslotted
Thickness		 Width of Slot
Basic Max Min Max Min Basic Max Min Max Mmin Max Min Max
3/8 0.3750
7/16 0.4375
1/2 0.5000
9/16
11/16
3/4		 0.562
0.688
0.750		 0.551
0.675
0.736		 0.650
0.794
0.866		 0.628
0.768
0.840		 21/64
3/8
7/16		 0.337
0.385
0.448		 0.320
0.365
0.427		 0.21
0.23
0.29		 0.19
0.21
0.27		 0.15
0.15
0.18		 0.12
0.12
0.15		 0.018
0.018
0.019
5/8 0.6250
3/4 0.7500
7/8 0.8750
15/16
1-1/8
1-5/16		 0.938
1.125
1.312		 0.922
1.088
1.269		 1.083
1.299
1.516		 1.051
1.240
1.447		 35/64
41/64
3/4		 0.559
0.665
0.776		 0.535
0.617
0.724		 0.34
0.40
0.52		 0.32
0.38
0.49		 0.24
0.24
0.24		 0.18
0.18
0.18		 0.021
0.023
0.025
1 1.0000
1-1/8 1.1250
1-1/4 1.2500
1-1/2 1.5000
1-1/2
1-11/16
1-7/8
2-1/4		 1.500
1.688
1.875
2.250		 1.450
1.631
1.812
2.175		 1.732
1.949
2.165
2.598		 1.653
1.859
2.066
2.480		 55/64
31/32
1-1/16
1-9/32		 0.887
0.999
1.094
1.317		 0.831
0.939
1.030
1.245		 0.59
0.64
0.70
0.86		 0.56
0.61
0.67
0.82		 0.30
0.33
0.40
0.46		 0.24
0.24
0.31
0.37		 0.027
0.030
0.033
0.039

Serrated Flange Lock Nuts

Serrated Flange Lock Nuts
Nominal Size or
Basic Major Diameter of Thread		 F G B H K J
Width
Across Flats		 Width
Across
Corners		 Flange
Diameter		 Nut
Thickness		 Wrenching
Length		 Flange
Thickness
Max. Min. Max. Min. Max. Min. Max. Min. Min. Max.
6 0.1380
8 0.1640
10 0.1900
0.312
0.344
0.375		 0.302
0.334
0.365		 0.361
0.397
0.433		 0.342
0.381
0.416		 0.422
0.469
0.500		 0.406
0.452
0.480		 0.171
0.203
0.219		 0.156
0.187
0.203		 0.10
0.13
0.13		 0.02
0.02
0.03
12 0.216
1/4 0.2500
5/16 0.3125
0.438
0.438
0.500		 0.428
0.428
0.489		 0.505
0.505
0.577		 0.488
0.488
0.557		 0.594
0.594
0.680		 0.574
0.574
0.660		 0.236
0.236
0.283		 0.222
0.222
0.268		 0.14
0.14
0.17		 0.04
0.04
0.04
3/8 0.3750
7/16 0.4375
1/2 0.5000
0.562
0.688
0.750		 0.551
0.675
0.736		 0.650
0.794
0.866		 0.628
0.768
0.840		 0.750
0.937
1.031		 0.728
0.910
1.000		 0.347
0.395
0.458		 0.330
0.375
0.437		 0.23
0.26
0.31		 0.04
0.04
0.05
5/8 0.6250
3/4 0.7500
0.938
1.125		 0.922
1.088		 1.083
1.299		 1.051
1.240		 1.281
1.500		 1.248
1.460		 0.569
0.675		 0.545
0.627		 0.40
0.46		 0.05
0.06

Lock Nuts

"K" Lock Nuts
Nominal
Size or Basic Thread Diameter		 F G H I
Width Across Flats Width Across
Corners		 Thickness Washer
Diameter
Hex
Basic Max. Min. Max. Min. Max. Min. Ref.
4 0.1120
6 0.1380
8 0.1640
10 0.1900
1/4 0.2500
5/16 0.3125
3/8 0.3750
1/4
5/16
11/32
3/8
7/16
1/2
9/16		 0.250
0.312
0.344
0.375
0.438
0.500
0.562		 0.241
0.302
0.332
0.362
0.423
0.489
0.551		 0.289
0.361
0.397
0.433
0.505
0.577
0.650		 0.275
0.344
0.378
0.413
0.482
0.557
0.628		 0.098
0.114
0.130
0.130
0.193
0.273
0.385		 0.087
0.102
0.117
0.117
0.178
0.258
0.365		 0.281
0.344
0.375
0.406
0.500
0.578
0.656

Square and Hex Machine Screw Nuts

Square and Hex Machine Screw Nuts
Nominal Size
or
Basic
Thread
Diameter		 F G G1 H
Width Across Flats Width Across Corners Thickness
Square Hex
Basic Max. Min. Max. Min. Max. Min. Max. Min.
2 0.0860
3 0.0990
3/16
3/16		 0.188
0.188		 0.180
0.180		 0.265
0.265		 0.247
0.247		 0.217
0.217		 0.205
0.205		 0.066
0.066		 0.057
0.057
4 0.1120
5 0.1250
6 0.1380
1/4
5/16
5/16		 0.250
0.312
0.312		 0.241
0.302
0.302		 0.354
0.442
0.442		 0.331
0.415
0.415		 0.289
0.361
0.361		 0.275
0.344
0.344		 0.098
0.114
0.114		 0.087
0.102
0.102
8 0.1640
10 0.1900
12 0.2160
11/32
3/8
7/16		 0.344
0.375
0.438		 0.332
0.362
0.423		 0.486
0.530
0.619		 0.456
0.497
0.581		 0.397
0.433
0.505		 0.378
0.413
0.482		 0.130
0.130
0.161		 0.117
0.117
0.148
1/4 0.2500
5/16 0.3125
3/8 0.3750
7/16
9/16
5/8		 0.438
0.562
0.625		 0.423
0.545
0.607		 0.619
0.795
0.884		 0.581
0.748
0.833		 0.505
0.650
0.722		 0.482
0.621
0.692		 0.193
0.225
0.257		 0.178
0.208
0.239

Hex Panel Nuts

Hex Panel Nuts
Size Across the Flats Thickness
1/8-27
1/8-27
3/8-32
3/8-32
15/32-32		 9/16
9/16
1/2
9/16
9/16		 1/8
3/16
3/32
3/32
3/32

Regular Square Nuts

Regular Square Nuts
Nominal or Basic Major Dia. of Thread F G H
Width Across Flats Width Across Corners Across Corners Thickness
Basic Max. Mm. Max. Mm. Basic Max. Mm.
1/4 0.2500
5/16 0.3125
3/8 0.3750
7/16 0.4375
7/16
9/16
5/8
3/4		 0.438
0.562
0.625
0.750		 0.425
0.547
0.606
0.728		 0.619
0.795
0.884
1.061		 0.584
0.751
0.832
1.000		 7/32
17/64
21/64
3/8		 0.235
0.283
0.346
0.394		 0.203
0.249
0.310
0.356
1/2 0.5000
5/8 0.6250
3/4 0.7500
7/8 0.8750
13/16
1
1-1/8
1-5/16		 0.812
1.000
1.125
1.312		 0.788
0.969
1.088
1.269		 1.149
1.414
1.591
1.856		 1.082
1.330
1.494
1.742		 7/16
35/64
21/32
49/64		 0.458
0.569
0.680
0.792		 0.418
0.525
0.632
0.740
1 1.0000
1-1/4 1.2500
1-1/2 1.5000
1-1/2
1-7/8
2-1/4		 1.500
1.875
2.250		 1.450
1.812
2.175		 2.121
2.652
3.182 		1.991
2.458
2.956		 7/8
1-3/32
1-5/16		 0.903
1.126
1.348		 0.847
1.062
1.276

Nylon Insert Stop Nuts

Nylon Insert Stop Nuts
Nominal Size or Basic Thread Diameter F H I G
Width Across Flats Thickness Side
Height		 Width
Across
Comers
Basic Max. Min. Max. Min. Ref. Ref.
4 0.1120
6 0.1380
8 0.1640
10 0.1900
1/4 0.2500
5/16 0.3125
3/8 0.3750
7/16 0.4375
1/2 0.5000
9/16 0.5625
5/8 0.6250
3/4 0.7500
7/8 0.8750
1 1.0000
1-1/8 1.1250
1-1/4 1.2500
1-1/2 1.5000
1/4
5/16
11/32
3/8
7/16
1/2
9/16
11/16
3/4
7/8
15/16
1-1/8
1-5/16
1-1/2
1-11/16
1-7/8
2-1/4		 0.251
0.313
0.345
0.376
0.439
0.502
0.565
0.690
0.752
0.877
0.940
1.127
1.315
1.502
1.690
1.877
2.252		 0.241
0.302
0.332
0.362
0.428
0.489
0.551
0.675
0.736
0.861
0.922
1.088
1.269
1.450
1.631
1.812
2.175		 0.153
0.188
0.239
0.249
0.328
0.359
0.468
0.468
0.609
0.656
0.765
0.890
0.999
1.078
1.203
1.422
1.640		 0.133
0.168
0.219
0.229
0.298
0.329
0.438
0.438
0.579
0.626
0.735
0.860
0.969
1.061
1.141
1.360
1.578		 0.081
0.103
0.140
0.140
0.225
0.250
0.335
0.324
0.464
0.469
0.593
0.742
0.790
0.825
0.930
1.125
1.313		 0.268
0.399
0.374
0.410
0.482
0.552
0.622
0.698
0.837
0.978
1.051
1.191
1.430
1.615
1.826
2.038
2.444

Nylon Insert Stop Nuts

Thin Pattern
Nominal Size or Basic Thread
Diameter		 F H I G
Width Across Flats Thickness Side
Height		 Width
Across
Corners
Basic Max. Min. Max. Min. Ref. Ref.
4 .1120
6 .1380
8 .1640
10 .1900
1/4 .2500
5/16 .3125
3/8 .3750
7/16 .4375
1/2 .5000
5/8 .6250
3/4 .7500
1/4
5/16
11/32
3/8
7/16
1/2
9/16
11/16
3/4
15/16
1-1/8		 .251
.313
.345
.376
.439
.502
.565
.690
.752
.940
1.127		 .241
.302
.332
.362
.428
.489
.551
.675
.736
.922
1.088		 .124
.140
.187
.187
.218
.265
.281
.328
.328
.406
.421		 .094
110
.157
.157
.188
.235
.251
.298
.298
.376
.391		 .075
.090
.110
.110
125
.158
.150
.190
.225
.264
.288		 .268
.399
.374
.410
.482
.552
.622
.694
.837
1.051
1.191

>Wing Nuts Stamped

Stamped Wing Nuts
Nominal
Size or Basic Major Diameter of Thread		 Threads per Inch A B C D E G H T
Wing Spread Wing Height Wing Thickness Between Wings Boss Diameter Boss Height Wall Height Stock Thickness
Max. Min. Max. Min. Max. Min. Min. Max. Min. Min. Min. Max. Min.
6 0.1380
8 0.1640
10 0.1900
1/4 0.2500
5/16 0.3125
3/8 0.3750
32
32
24 & 32
20
18 & 24
16 & 24		 0.78
0.78
0.91
1.11
1.30
1.41		 0.72
0.72
0.85
1.05
1.24
1.34		 0.40
0.40
0.47
0.50
0.59
0.67		 0.34
0.34
0.41
0.44
0.53
0.61		 0.18
0.18
0.21
0.25
0.30
0.34		 0.14
0.14
0.17
0.21
0.26
0.30		 0.25
0.25
0.34
0.34
0.46
0.69		 0.41
0.41
0.53
0.62
0.73
0.83		 0.35
0.35
0.47
0.56
0.67
0.77		 0.08
0.08
0.10
0.11
0.14
0.16		 0.12
0.12
0.12
0.12
0.18
0.18		 0.04
0.04
0.04
0.05
0.06
0.06		 0.03
0.03
0.03
0.04
0.05
0.05

Stover Locknuts Grade C Automation Style

Stover(r) Locknuts
Nom.
Size
In
Inches		 T W B
Width Across Flats Overall
Thickness		 Hex
Height
Nom. Max. Min. Max. Min. (Min.)
1/4
5/16
3/8		 7/16
1/2
9/16		 0.4385
0.5020
0.5645		 0.428
0.489
0.551		 0.226
0.273
0.337		 0.212
0.258
0.320		 0.145
0.166
0.198
7/16
1/2
9/16		 11/16
3/4
7/8		 0.6895
0.7520
0.8770		 0.675
0.736
0.861		 0.385
0.448
0.496		 0.365
0.427
0.473		 0.223
0.262
0.286
5/8
3/4		 15/16
1-1/8		 0.9395
1.1270		 0.922
1.088		 0.559
0.665		 0.535
0.617		 0.329
0.382
7/8
1		 1-5/16
1-1/2		 1.3145
1.5020		 1.2690
1.4500		 0.776
0.887		 0.724
0.831		 0.450
0.513

Grade GT Flange Style

Grade GT Flange Style
Nom.
Size
In
Inches		 F B H A K
Width Across Flats Flange
Diam.		 Overall
Thickness		 Hex
Height		 Flange
Thick.
Nom. Max. Min. (Max.) Max. Min. (Min.) (Min.)
3/8
1/2
5/8
3/4		 9/16
3/4
15/16
1-1/8		 0.5645
0.7520
0.9395
1.1270		 0.551
0.736
0.922
1.088		 0.810
1.070
1.330
1.585		 0.425
0.555
0.690
0.825		 0.404
0.528
0.646
0.742		 0.200
0.260
0.320
0.380		 0.060
0.080
0.100
0.110

Stover is a registered trademark of RB&W Corporation.

Stover Locknuts Grade C Hex Collar

Stover(r) Locknuts
Nom.
Size In
Inches		 T W H
Width Across Flats Overall
Thickness		 Hex
Height
Max. Min. Max. Min. Max. Min.
1-1/8
1-1/4
1-3/8
1-1/2
1-3/4
2		 1.688
1.875
2.062
2.250
2.625
3.000		 1.631
1.812
1.994
2.175
2.538
2.900		 0.999
1.094
1.206
1.317
1.540
1.763		 0.939
1.030
1.138
1.245
1.460
1.675		 0.657
0.719
0.793
0.865
1.012
1.158		 0.636
0.698
0.771
0.843
0.989
1.134

Stover is a registered trademark of RB&W Corporation.


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