WASHERS

Lock Washers

Internal Tooth
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
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
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

 

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
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

 

 

Washer Specifications

Countersunk
Finishing Washers
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

 

Lock Washers

Countersunk
External Tooth
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 Washers

Medium and Heavy Split Helical Spring Lock
Washers

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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