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ASME/ANSI B18.22M-1981
Metric regular sizes of plain washers
Nom
d max
d min
dc max
dc min
h max
h min
Φ1.6
2.09
1.95
5
4.7
0.7
0.5
Φ2
2.64
2.5
6
5.7
0.9
0.6
Φ2.5
3.14
3
8
7.64
0.9
0.6
Φ3
3.68
3.5
10
9.64
1.2
0.8
Φ3.5
4.18
4
10
9.64
1.4
1
Φ4
4.88
4.7
12
11.57
1.4
1
Φ5
5.78
5.5
15
14.57
1.75
1.2
Φ6
6.87
6.65
18.8
18.37
1.75
1.2
Φ8
9.12
8.9
25.4
24.48
2.3
1.6
Φ10
11.12
10.85
28
27.48
2.8
2
Φ12
13.57
13.3
34
33.38
3.5
2.5
Φ14
15.52
15.25
39
38.38
3.5
2.5
Φ16
17.52
17.25
44
43.38
4
3
Φ20
22.32
21.8
50
49.38
4.6
3.5
Φ24
26.12
25.6
56
54.8
5.1
4
Φ30
33.02
32.4
72
70.8
5.6
4.5
Φ36
38.92
38.3
90
88.6
6.4
5
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