ISO Metric Crinkle Washers : General Engineering
(Dimensions in milimetres)
Inside
Outside
Height
Nominal
Diameter d1
Diameter d2
h
(Thread)
Thickness
Diameter
Max
Min
Max
Min
Max
Min
s
M1.6
1.8
1.7
3.7
3.52
0.51
0.36
0.16
M2
2.3
2.2
4.6
4.42
0.53
0.38
0.16
M2.5
2.8
2.7
5.8
5.62
0.53
0.38
0.16
M3
3.32
3.2
6.4
6.18
0.61
0.46
0.16
M4
4.42
4.3
8.1
7.88
0.84
0.69
0.28
M5
5.42
5.3
9.2
8.98
0.89
0.74
0.30
M6
6.55
6.4
11.5
11.23
1.14
0.99
0.40
M8
8.55
8.4
15.0
14.73
1.40
1.25
0.40
M10
10.68
10.5
19.6
19.27
1.70
1.55
0.55
M12
13.18
13.0
22.0
21.67
1.90
1.65
0.55
(M14)
15.18
15.0
25.5
25.17
2.06
1.80
0.55
M16
17.18
17.0
27.8
27.47
2.41
2.16
0.70
(M18)
19.21
19.0
31.3
30.91
2.41
2.16
0.70
M20
21.21
21.0
34.7
34.31
2.66
2.16
0.70
Second choice sizes in brackets().
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