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Hex Nuts

Finished Hex Nuts

Available in plain steel, zinc plated or stainless steel; in coarse and fine, standard or left hand threads. Stocked in sizes from 1/4" to 3" in Grades 2, 5, and 8.

See dimensions on standard finished hex nuts. A dimension chart on grade 5 & 8 hex nuts is also available.

For easy comparison, see sizes and dimensions on Standard & Heavy Hex Nuts, Combined.

Group codes Represented: HN2, HN2Z, SSHN, LHHN, HN5, HN5Z, HN8
Part# Example: 100UHN2, 56SHN2Z, 62UHN8

Grade 8 Hex Hi-Nuts

All hi-nuts are SAE thread and Grade B. They are commonly used on suspension U-bolts or anywhere extra thread engagement is required.

Group codes Represented: HN
Part# Example: 87SHN

Tap Size
W.A.F.
Thick
(F)
(T)
7/16 - 20
5/8
39/64
1/2 - 20
3/4
11/16
9/16 - 18
7/8
49/64
5/8 - 18
1 5/16
27/32
3/4 - 16
1 1/16
1
1 1/8
1 1/4
7/8 - 14
1 1/4
1 5/32
1 5/16
1 - 14
1 7/16
1 5/16
1 1/2
1 1/8 - 12
1 5/8
1 15/32
1 1/4 - 12
1 13/16
1 5/8
2
2 3/4
1 1/2 - 12
2 3/16
2

 

 

 

 

 

 

 

Hardened Thick Hex Nuts

All hardened thick hex nuts are a finished pattern and hardened for use with Grade B or better bolts. These nuts have a proof load of 180,000 PSI.

Group codes Represented: THN8
Part# Example: 43UTHN8

Normal Size
T
Min.
Max
1/4 - 20
0.274
0.288
5/16 - 18
0.320
0.336
3/8 - 16
0.398
0.415
7/16 - 14
0.444
0.463
1/2 - 13
0.552
0.573
5/8 - 11
0.706
0.731
3/4 - 10
0.798
0.827

Slotted Hex Nuts

Six slots milled through for use with cotter pins to securely hold nuts and to keep them from turning. Available in plain steel and stainless steel in course and fine thread. Stocked in sizes from 1/4" to 3".

Group codes represented: SLHN
Part# examples: 50USLHN, 31SSLHN

Nominal Size or Basic Major Diameter 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
Min
Max
Min
Max
3/8
0.375
9/16
0.562
0.551
0.650
0.625
21/64
0.337
0.32
0.21
0.19
0.15
0.12
0.018
7/16
0.4375
11/16
0.688
0.675
0.794
0.738
3/8
0.385
0.365
0.23
0.21
0.15
0.12
0.018
1/2
0.500
3/4
0.750
0.736
0.866
0.840
7/19
0.448
0.427
0.29
0.27
0.18
0.15
0.019
5/8
0.625
15/16
0.938
0.922
1.083
1.051
35/64
0.559
0.535
0.34
0.32
0.24
0.18
0.021
3/4
0.750
1 - 1/8
1.125
1.088
1.299
1.240
61/64
0.665
0.617
0.40
0.38
0.24
0.18
0.023
7/8
0.875
1 - 5/16
1.312
1.269
1.516
1.447
3/4
0.776
0.724
0.52
0.49
0.24
0.18
0.025
1
1.000
1 - 1/2
1.500
1.45
1.732
1.653
55/64
0.887
0.831
0.59
0.56
0.30
0.24
0.027
1 - 1/8
1.125
1 - 11/16
1.688
1.631
1.949
1.859
31/32
0.999
0.939
0.64
0.61
0.33
0.24
0.030
1 - 1/4
1.250
1 - 7/8
1.875
1.812
2.165
2.066
1 - 1/16
1.094
1.03
0.70
0.67
0.40
0.31
0.033
1 - 1/2
1.500
2 - 1/4
2.25
2.175
2.598
2.48
1 - 9/32
1.317
1.245
0.86
0.82
0.46
0.37
0.039

Hex Acorn Cap Nuts

Design to cover or protect any exposed bolt threads or to give a ‘finished’ appearance, these nuts are available in coarse and fine thread. Stocked in sizes from #6 to 1".

Group codes Represented: AHN
Part# Example: 56UAHN, 25SAHN

One Piece Hex Cap Nuts, Low Crown
Nominal Size or Basic Major Diameter of Thread
F
G
A
H
Q
T
U
Width Across Flats
Width Across Corners
Body Diameter
Overall Height
Hexagon Height
Drill Depth
Full Thread
Max
Min
Max
Min
Max
Min
6
0.1380
0.3125
0.302
0.361
0.344
0.30
0.34
0.16
0.25
0.16
8
0.1640
10
0.1900
0.3750
0.362
0.433
0.413
0.36
0.41
0.19
0.28
0.19
1/4
0.2500
0.4375
0.428
0.505
0.488
0.41
0.47
0.22
0.34
0.25
5/16
0.3125
0.5000
0.489
0.577
0.557
0.47
0.53
0.25
0.41
0.31
3/8
0.3750
0.5625
0.551
0.650
0.628
0.53
0.62
0.28
0.45
0.38
1/2
0.5000
0.7500
0.736
0.866
0.840
0.72
0.81
0.38
0.59
0.50
5/8
0.6250
0.9375
0.922
1.083
1.051
0.91
1.00
0.47
0.75
0.62
3/4
0.7500
1.0625
1.045
1.227
1.191
1.03
1.16
0.53
0.88
0.75

Jam Hex Nuts

Half the thickness of a regular nut, hex jam nuts are available in coarse or fine, right or left handed threads. 18-8 and 316 stainless steel are available upon request. Stocked in diameters from 1/4" to 2", grades 2, 5 and 8.

Group codes represented: JHN
Part# examples: 31UJHN, 50SJHN

 

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
5/32
0.163
0.150
5/16
0.3125
1/2
0.500
0.489
0.577
0.557
3/16
0.195
0.180
3/8
0.3750
3/16
0.562
0.551
0.650
0.628
7/32
0.227
0.210
7/16
0.4375
11/16
0.688
0.675
0.794
0.768
1/4
0.260
0.240
1/2
0.5000
3/4
0.750
0.736
0.866
0.840
5/16
0.323
0.302
9/16
0.5625
7/8
0.875
0.861
1.010
0.982
5/16
0.324
0.301
5/8
0.6250
15/16
1.938
0.922
1.083
1.051
3/8
0.387
0.363
3/4
0.7500
1 1/8
1.125
1.088
1.299
1.240
27/64
0.446
0.398
7/8
0.8750
1 5/16
1.312
1.269
1.516
1.447
31/64
0.510
0.458
1
1.0000
1 1/2
1.500
1.450
1.732
1.653
35/64
0.575
0.519
1 1/8
1.1250
1 11/16
1.688
1.631
1.949
1.859
39/64
0.639
0.579
1 1/4
1.2500
1 7/8
1.875
1.812
2.165
2.066
23/32
0.751
0.687
1 3/8
1.3750
2 1/16
2.062
1.994
2.382
2.273
25/32
0.815
0.747
1 1/2
1.5000
2 1/4
2.250
2.175
2.598
2.480
27/32
0.880
0.808
1 3/4
1.7500
2 5/8
2.625
2.538
3.031
2.893
31/32
1.009
0.929
2
2.0000
3
3.000
2.900
3.464
3.306
1 3/32
1.138
1.050

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