ISO Flat Washer Size Table Chart ISO 7089

ISO Hardware Engineering Data
ANSI Hardware Engineering Data

The following tables define the sizes for metric flat washers per ISO 7089.

ISO Flat Washer Size Table Chart ISO 7089

Flat Washer Per. ISO 7089 Size Table
All size units given in mm

For Screw
Nominal Size
Hole Diameter
Outside Diameter
Washer Thickness
M1.6
1.7
4
0.3
M2
2.2
5
0.3
M2.5
2.7
6
0.5
M2.6
2.8
7
0.5
M3
3.2
7
0.5
M3.5
3.7
8
0.5
M4
4.3
9
0.8
M5
5.3
10
1
M6
6.4
12
1.6
M7
7.4
14
1.6
M8
8.4
16
1.6
M10
10.5
20
2
M12
13
24
2.5
M14
15
28
2.5
M16
17
30
3
M18
19
34
3
M20
21
37
3
M22
23
39
3
M24
25
44
4
M27
28
50
4
M30
31
56
4
M33
34
60
5
M36
37
66
5
M39
40
72
6
M42
43
78
7
M45
46
85
7
M48
50
92
8
M52
54
98
8
M56
58
105
9

ISO Flat Washer Size Table Chart ISO 7089

Flat Washer Per. ISO 7416 Size Chart
All size units given in mm

Nominal Size
Hole Dia
Outside Dia
Washer Thick
12.0000
13.0000
25.0000
4.60000
16.0000
17.0000
33.0000
4.60000
20.0000
21.0000
40.0000
4.60000
24.0000
25.0000
47.0000
4.60000
30.0000
31.0000
56.0000
5.60000
36.0000
37.0000
66.0000
5.60000

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