Washers

Lock Washers

Internal Tooth

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Nominal
Washer Size

Inside Diameter

Outside Diameter

Thickness

Min.

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

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Nominal
Washer Size

Inside Diameter

Outside Diameter

Thickness

Min.

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

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Nominal Washer Size

A
Inside Diameter

B
Outside Diameter

C
Thickness

Min.

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 Click here to Request a quote.

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

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Bolt Size

Approx
No. in
20#

101/4

1/4

5/16

3/8

1/2

7/329/32

9/32

11/32

13/32

17/32

1-1/4

1-1/2

1-1/4

1-1/2

1-1/4

1-1/2

.051
.080
.051
.080
.051
.080
.051
.080
.051
.080
.051
.080
.051
.080
.051
.080
.051
.080

1.4M1.5M

.92M

.62M

.96M

.64M

.94M

.66M

.38M

USS Washers

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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

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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 Click here to Request a quote.

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

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Nominal
Washer Size

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

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Nominal
Washer Size

T+t
2

Inside Diameter

Outside Diameter

Washer Section

Width

Thickness

Mm.

Max.

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

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Nominal
Washer Size

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

Washers

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