Description:

A thin, flat, circular steel part with a centrally located hole.

 

Advantages:

Washers are designed for assembly around a bolt or screw, between the bearing surface of the fastener and the part to which it is attached.

Flat washers are used to improve stress distribution, and to span large clearance holes. USS washers are designed to meet the majority of industrial applications in manufacturing, maintenance and repair.

 

 

USS Flatwashers

 

USS LOW CARBON WASHERS ANSI B18.22.1
Bolt Size
Outside Diameter
Inside Diameter
Thickness
Nominal
Max
Min
Nominal
Max
Min
American Standard
(Gauge)
Max
Min
3/16
9/16
0.577
0.557
1/4
0.265
0.245
18 (3/64)
.065
.036
1/4
3/4
0.749
0.727
5/16
0.327
0.307
16 (1/16)
.080
.051
5/16
7/8
0.905
0.868
3/8
0.390
0.370
14 (5/64)
.104
.064
3/8
1"
1.030
0.993
7/16
0.453
0.433
14 (5/64)
.104
.064
7/16
1-1/4
1.280
1.243
1/2
0.515
0.495
14 (5/64)
.104
.064
1/2
1-3/8
1.405
1.368
9/16
0.577
0.557
12 (7/64)
.132
.086
9/16
1-1/2
1.499
1.462
5/8
0.640
0.620
21 (7/64)
.132
.086
5/8
1-3/4
1.780
1.743
11/16
0.718
0.681
10 (9/64)
.160
.108
3/4
2"
2.030
1.993
13/16
0.842
0.805
9 (5/32)
.177
.122
7/8
2-1/4
2.280
2.243
15/16
0.968
0.931
8 (11/64)
.192
.136
1"
2-1/2
2.530
2.493
1-1/16
1.092
1.055
8 (11/64)
.192
.136
1-1/8
2-3/4
2.780
2.743
1-1/4
1.280
1.243
8 (11/64)
.192
.136
1-1/4
3"
3.030
2.993
1-3/8
1.405
1.368
8 (11/64)
.192
.136
1-3/8
3-1/4
3.295
3.240
1-1/2
1.545
1.490
7 (3/16)
.213
.153
1-1/2
3-1/2
3.545
3.490
1-5/8
1.670
1.615
7 (3/16)
.213
.153
1-5/8
3-3/4
3.795
3.740
1-3/4
1.795
1.740
7 (3/16)
.213
.153
1-3/4
4"
4.045
3.990
1-7/8
1.920
1.865
7 (3/16)
.213
.153
1-7/8
4-1/4
4.295
4.240
2"
2.045
1.990
7 (3/16)
.213
.153
2"
4-1/2
4.545
4.490
2-1/8
2.170
2.115
7 (3/16)
.213
.153
2-1/4
4-3/4
4.795
4.740
2-3/8
2.420
2.365
5 (7/32)
.248
.193
2-1/2
5"
5.045
4.990
2-5/8
2.670
2.615
4 (15/64)
.280
.210
2-3/4
5-1/4
5.315
5.240
2-7/8
2.940
2.865
3 (1/4)
.310
.228
3"
5-1/2
5.565
5.490
3-1/8
3.190
3.115
2 (5/32)
.327
.249

 

 

 

 

 

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