Standard Locknut and Locknut Shaft Inch Dimensions

Locknut Information

Standard Locknuts – (Series N-00) for Ball Bearings and Cylindrical and Spherical Roller Bearings. Inch

LockNut
Number
Thds.
per
Inch
Thread Minor
Dia.
Thread Pitch
Dia.
Thread Major
Dia. d
Outside
Dia.
C
Face Diameter
E
Slot Dimension
Thickness
D
Width
G
Height
H
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Max.
Min.
Max.
N-00
32
0.3572
0.3606
0.3707
0.3733
0.391
0.755
.605
.625
.120
.130
.073
.209
.229
N-01
32
0.4352
0.4386
0.4487
0.4513
0.469
0.880
.699
.719
.120
.130
.073
.303
.323
N-02
32
0.5522
0.5556
0.5657
0.5687
0.586
1.005
.793
.813
.120
.130
.104
.303
.323
N-03
32
0.6302
0.6336
0.6437
0.6467
0.664
1.130
.918
.938
.120
.130
.104
.334
.354
N-04
32
0.7472
0.7506
0.7607
0.7641
0.781
1.380
1.105
1.125
.178
.198
.104
.365
.385
N-05
32
0.9352
0.9386
0.9487
0.9521
0.969
1.568
1.261
1.281
.178
.198
.104
.396
.416
N-06
18
1.1129
1.1189
1.1369
1.1409
1.173
1.755
1.480
1.500
.178
.198
.104
.396
.416
N-07
18
1.3159
1.3219
1.3399
1.3439
1.376
2.068
1.793
1.813
.178
.198
.104
.428
.448
N-08
18
1.5029
1.5089
1.5269
1.5314
1.563
2.255
1.980
2.000
.240
.260
.104
.428
.448
N-09
18
1.7069
1.7129
1.7309
1.7354
1.767
2.536
2.261
2.281
.240
.260
.104
.428
.448
N-10
18
1.9069
1.9129
1.9309
1.9354
1.967
2.693
2.418
2.438
.240
.260
.104
.490
.510
N-11
18
2.0969
2.1029
2.1209
2.1260
2.157
2.974
2.636
2.656
.240
.260
.135
.490
.510
N-12
18
2.2999
2.3059
2.3239
2.3290
2.360
3.161
2.824
2.844
.240
.260
.135
.521
.541
N-13
18
2.4879
2.4949
2.5119
2.5170
2.548
3.380
3.043
3.063
.240
.260
.135
.553
.573
N-14
18
2.6909
2.6969
2.7149
2.7200
2.751
3.630
3.283
3.313
.240
.260
.135
.553
.573
AN-15
12
2.8428
2.8518
2.8789
2.8843
2.933
3.880
3.533
3.563
.360
.385
.135
.584
.604

All dimensions in inches. For dimensions in millimeters, multiply inch values, except thread diameters, by 25.4 and round result to two decimal places. Threads are American National form, Class 3. Typical steels for locknuts are: AISI, C1015, C1018, C1020, C1025, C1035, C1117, C1118, C1212, C1213, and C1215. Minimum hardness, tensile strength, yield strength and elongation are given in ANSI/ABMA 8.2-1991 which also lists larger sizes of locknuts.

Standard Shafts For Locknuts – (Series N-00) for Ball Bearings and Cylindrical and Spherical Roller Bearings - Inch Design
Locknut
Number
Bearing
Bore
V2
Threadsa
Relief
Keyway
No.
per
inch
Major
Dia.
Pitch
Dia.
Minor
Dia.
Length
L
Dia.
A
Width
W
Depth
H
Width
S
M
Max.
Max.
Max.
Max.
Max.
Max.
Max.
Min.
Min.
Min.
N-00
0.3937
0.312
32
0.391
0.3707
0.3527
0.297
0.3421
0.078
0.062
0.125
0.094
N-01
0.4724
0.406
32
0.469
0.4487
0.4307
0.391
0.4201
0.078
0.062
0.125
0.094
N-02
0.5906
0.500
32
0.586
0.5657
0.5477
0.391
0.5371
0.078
0.078
0.125
0.094
N-03
0.6693
0.562
32
0.664
0.6437
0.6257
0.422
0.6151
0.078
0.078
0.125
0.094
N-04
0.7874
0.719
32
0.781
0.7607
0.7427
0.453
0.7321
0.078
0.078
0.188
0.094
N-05
0.9843
0.875
32
0.969
0.9487
0.9307
0.484
0.9201
0.078
0.094
0.188
0.125
N-06
1.1811
1.062
18
1.173
1.1369
1.1048
0.484
1.0942
0.109
0.094
0.188
0.125
N-07
1.3780
1.250
18
1.376
1.3399
1.3078
0.516
1.2972
0.109
0.094
0.188
0.125
N-08
1.5748
1.469
18
1.563
1.5269
1.4948
0.547
1.4842
0.109
0.094
0.312
0.125
N-09
1.7717
1.688
18
1.767
1.7309
1.6988
0.547
1.6882
0.141
0.094
0.312
0.156
N-10
1.9685
1.875
18
1.967
1.9309
1.8988
0.609
1.8882
0.141
0.094
0.312
0.156
N-11
2.1654
2.062
18
2.157
2.1209
2.0888
0.609
2.0782
0.141
0.125
0.312
0.156
N-12
2.3622
2.250
18
2.360
2.3239
2.2918
0.641
2.2812
0.141
0.125
0.312
0.156
N-13
2.5591
2.438
18
2.548
2.5119
2.4798
0.672
2.4692
0.141
0.125
0.312
0.156
N-14
2.7559
2.625
18
2.751
2.7149
2.6828
0.672
2.6722
0.141
0.125
0.312
0.250
AN-15
2.9528
2.781
12
2.933
2.8789
2.8308
0.703
2.8095
0.172
0.125
0.312
0.250
AN-16
3.1496
3.000
12
3.137
3.0829
3.0348
0.703
3.0135
0.172
0.125
0.375
0.250

a Threads are American National form Class 3. All dimensions in inches. For dimensions in millimeters, multiply inch values, except thread diameters, by 25.4 and round result to two decimal places. For larger sizes, see ANSI/ABMA 8.2-1991

Figure 1