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Washers


Lock Washers -- Internal Tooth

Internal Tooth Lock Washer
Nominal
Washer Size
A B C
Inside Diameter Outside Diameter Thickness
Min. Max. Max. Min. Max. Min.
2 0.086
4 0.112
6 0.138
8 0.164
10 0.190
12 0.216
1/4 0.250
5/16 0.312
3/8 0.375
7/16 0.438
1/2 0.500
5/8 0.625
1/8 Pipe
0.089
0.115
0.141
0.168
0.195
0.221
0.256
0.320
0.384
0.448
0.512
0.640
0.425
0.095
0.123
0.150
0.176
0.204
0.231
0.267
0.332
0.398
0.464
0.530
0.663
0.410
0.200
0.270
0.295
0.340
0.381
0.410
0.478
0.610
0.692
0.789
0.900
1.071
0.615
0.175
0.255
0.275
0.325
0.365
0.394
0.460
0.594
0.670
0.740
0.867
1.045
0.595
0.015
0.019
0.021
0.023
0.025
0.025
0.028
0.034
0.040
0.040
0.045
0.050
0.022
0.010
0.015
0.017
0.018
0.020
0.020
0.023
0.028
0.032
0.032
0.037
0.042
0.017

External Tooth

External Tooth Lock Washer
Nominal
Washer Size
A B C
Inside Diameter Outside Diameter Thickness
Min. Max. Max. Min. Max. Min.
4 0.112
6 0.138
8 0.164
10 0.190
12 0.216
1/4 0.250
5/16 0.312
3/8 0.375
7/16 0.438
1/2 0.500
5/8 0.625
0.115
0.141
0.168
0.195
0.221
0.256
0.320
0.384
0.448
0.513
0.641
0.123
0.150
0.176
0.204
0.231
0.267
0.332
0.398
0.464
0.530
0.663
0.260
0.320
0.381
0.410
0.475
0.510
0.610
0.694
0.760
0.900
1.071
0.245
0.305
0.365
0.395
0.460
0.494
0.588
0.670
0.740
0.880
1.045
0.019
0.022
0.023
0.025
0.028
0.028
0.034
0.040
0.040
0.045
0.050
0.015
0.016
0.018
0.020
0.023
0.023
0.028
0.032
0.032
0.037
0.042

Internal - External Tooth

Internal-External Tooth Lock Washer
Nominal Washer Size A
Inside Diameter
B
Outside Diameter
C
Thickness
Min. Max. Max. Min. Max. Min.
6 0.138
8 0.164
10 0.190
1/4 0.250
0.141
0.168
0.195
0.256
0.150
0.176
0.204
0.267
0.510
0.510
0.610
0.760
0.495
0.495
0.580
0.725
0.028
0.028
0.034
0.040
0.023
0.023
0.028
0.032

Flat Washers -- Machine Screw

NO ID OD TH WT/M
2
4
5
6
8
10
12
14
.092
.125
.140
.150
.170
.203
.227
.265
.219
.280
.280
.375
.375
.438
.500
.562
.018
.026
.026
.032
.032
.032
.048
.048
.16
.36
.33
.83
.79
1.10
2.22
2.70
Machine Screw Flat Washer

 


Fender Washers

Bolt Size ID OD TH Approx
No. in
20#
10

1/4

1/4

1/4

5/16

5/16

3/8

3/8

1/2
7/32

9/32

9/32

9/32

11/32

11/32

13/32

13/32

17/32
1

1

1-1/4

1-1/2

1-1/4

1-1/2

1-1/4

1-1/2

2
.051
.080
.051
.080
.051
.080
.051
.080
.051
.080
.051
.080
.051
.080
.051
.080
.051
.080
1.4M

1.5M

.92M

.62M

.96M

.64M

.94M

.66M

.38M


USS Washers

USS Washer
Bolt
Size, In.
Outside Dia.,
In.
Inside Dia.,
In.
American
Standard Gauge
Approx.
Lbs. Per
M Pcs.
Approx.
No./Pcs.
Per Lb.
3/16
1/4
5/16
3/8
7/16
1/2
9/16
5/8
3/4
7/8
1
1-1/8
1-1/4
1-3/8
1-1/2
1-5/8
1-3/4
1-7/8
2
2-1/4
2-1/2
2-3/4
3
9/16
3/4
7/8
1
1-1/4
1-3/8
1-1/2
1-3/4
2
2-1/4
2-1/2
2-3/4
3
3-1/4
3-1/2
3-3/4
4
4-1/4
4-1/2
4-3/4
5
5-1/4
5-1/2
1/4
5/16
3/8
7/16
1/2
9/16
5/8
11/16
13/16
15/16
1-1/16
1-1/4
1-3/8
1-1/2
1-5/8
1-3/4
1-7/8
2
2-1/8
2-3/8
2-5/8
2-7/8
3-1/8
18(3/64)
16(1/16)
14(5/64)
14(5/64)
14(5/64)
12(7/64)
12(7/64)
10(9/64)
9(5/32)
8(11/64)
8(11/64)
8(11/64)
8(11/64)
7(3/16)
7(3/16)
7 (3/16)
7(3/16)
7(3/16)
7(3/16)
5(7/32)
4(15/64)
3(1/4)
2(5/32)
2.8
6.7
11.5
14.9
24.4
38.5
45.5
77
110
153
188
220
260
333
385
448
500
569
630
826
961
1100
1300
361
149
87
67
41
26
22
13
9.1
6.5
5.3
4.5
3.8
3
2.6
2.3
2
1.8
1.6
1.2
1
.9
.8

 

SAE Washers

Bolt Size, In. Outside Dia., In. Inside Dia., In. American
Standard Gauge
Approx.
Lbs. Per
M Pcs.
Approx.
No/Pcs.
Per Lb.
4
6
8
3/16
12
1/4
5/16
3/8
7/16
1/2
9/16
5/8
3/4
7/8
1
1-1/8
1-1/4
1-3/8
1-1/2
5/16
3/8
7/16
1/2
9/16
5/8
11/16
13/16
59/64
1-1/16
1-3/16
1-5/16
1-1/2
1-3/4
2
2-1/4
2-1/2
2-3/4
3
1/8
5/32
3/16
7/32
1/4
9/32
11/32
13/32
15/32
17/32
19/32
21/32
13/16
15/16
1-1/16
1-3/16
1-5/16
1-7/16
1-9/16
21(1/32)
18(3/64)
18(3/64)
18(3/64)
16(1/16)
16(1/16)
16(1/16)
16(1/16)
16(1/16)
13(3/32)
13(3/32)
13(3/32)
10(9/64)
10(9/64)
10(9/64)
10(9/64)
9(5/32)
9(5/32)
9(5/32)
.58
1.26
1.7
2.3
3.4
4.5
5.2
7.2
9.5
18.3
23.4
27.7
47.4
63
83
109
160
190
240
1650
790
585
435
280
222
192
140
105
55
43
36
21
16
12
9.2
6.25
5.25
4.25

 


Countersunk Finishing Washers

Countersunk Finishing Washer
Screw Size OD ID
Mm. Max.
6
8
10
12
1/4
.469
.531
.593
.656
.781
.170
.180
.235
.259
.305
.200
.210
.265
.289
.335

 


Countersunk
External Tooth Lock Washers

Lock Washer
Nominal
Washer Size
A B C D
Inside Diameter Outside
Diameter
Thickness Length
Min. Max. Ref. Max. Min. Max. Min.
6 0.138
8 0.164
10 0.190
1/4 0.250
0.140
0.167
0.195
0.255
0.150
0.177
0.205
0.267
0.301
0.340
0.369
0.468
0.021
0.021
0.025
0.025
0.017
0.017
0.020
0.020
0.092
0.105
0.099
0.128
0.082
0.088
0.083
0.113

 


Split Lock Washers -- Hi-Collar Helical Spring Lock Washers

Nominal
Washer Size
A B W T+t
2
Inside Diameter Outside Diameter Washer Section
Width Thickness
Mm. Max. Max. Mm. Mm.
4 0.112
6 0.138
8 0.164
10 0.190
0.115
0.141
0.168
0.194
0.121
0.148
0.175
0.202
0.173
0.216
0.267
0.294
0.022
0.030
0.042
0.042
0.022
0.030
0.047
0.047
1/4 0.250
5/16 0.312
3/8 0.375
0.255
0.318
0.382
0.263
0.238
0.393
0.365
0.460
0.533
0.047
0.062
0.076
0.078
0.093
0.125
Split Lock Washer

 


Split Lock Washers -- Medium and Heavy Split Helical Spring Lock

Split Lock Washer
Nominal
Washer Size
A B T W
Inside
Diameter
Outside
Diameter
Mean Sect. Thickness
(
T + t)
2
Section Width
Max. Min. Med. Max. Heavy Max. Med. Min. Heavy Min. Med. Min. Heavy Min.
2 0.086
3 0.099
4 0.112
5 0.125
0.094
0.107
0.120
0.133
0.088
0.101
0.114
0.127
0.172
0.195
0.209
0.236
0.182
0.209
0.223
0.252
0.020
0.025
0.025
0.031
0.025
0.031
0.031
0.040
0.035
0.040
0.040
0.047
0.040
0.047
0.047
0.055
6 0.138
8 0.164
10 0.190
12 0.216
0.148
0.174
0.200
0.227
0.141
0.167
0.193
0.220
0.250
0.293
0.334
0.377
0.266
0.307
0.350
0.391
0.031
0.040
0.047
0.056
0.040
0.047
0.056
0.063
0.047
0.055
0.062
0.070
0.055
0.062
0.070
0.077
1/4 0.250
5/16 0.312
3/8 0.375
7/16 0.438
0.262
0.326
0.390
0.455
0.254
0.317
0.380
0.443
0.489
0.586
0.683
0.779
0.491
0.596
0.691
0.787
0.062
0.078
0.094
0.109
0.077
0.097
0.115
0.133
0.109
0.125
0.141
0.156
0.110
0.130
0.145
0.160
1/2 0.500
9/16 0.562
5/8 0.625
11/16 0.688
0.518
0.582
0.650
0.713
0.506
0.570
0.635
0.698
0.873
0.971
1.079
1.176
0.883
0.981
1.093
1.192
0.125
0.141
0.156
0.172
0.151
0.170
0.189
0.207
0.171
0.188
0.203
0.219
0.176
0.193
0.210
0.227
3/4 0.750
13/16 0.812
7/8 0.875
15/16 0.938
0.775
0.843
0.905
0.970
0.760
0.824
0.887
0.950
1.271
1.367
1.464
1.560
1.291
1.391
1.494
1.594
0.188
0.203
0.219
0.234
0.226
0.246
0.266
0.284
0.234
0.250
0.266
0.281
0.244
0.262
0.281
0.298
1 1.000
1-1/16 1.062
1-1/8 1.125
1-3/16 1.188
1.042
1.107
1.172
1.237
1.017
1.080
1.144
1.208
1.661
1.756
1.853
1.950
1.705
1.808
1.909
2.008
0.250
0.266
0.281
0.297
0.306
0.326
0.345
0.364
0.297
0.312
0.328
0.344
0.319
0.338
0.356
0.373
1-1/4 1.250
1-5/16 1.312
1-3/8 1.375
1-7/16 1.438
1-1/2 1.500
1.302
1.366
1.432
1.497
1.561
1.271
1.334
1.398
1.462
1.525
2.045
2.141
2.239
2.334
2.430
2.113
2.211
2.311
2.406
2.502
0.312
0.328
0.344
0.359
0.375
0.384
0.403
0.422
0.440
0.458
0.359
0.375
0.391
0.406
0.422
0.393
0.410
0.427
0.442
0.458


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