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DIN 137-1987
Curved spring washers—Type A
Nom
d max
d min
dc max
dc min
h max
h min
H min
H max
Φ1
1.35
1.1
2.8
2.2
0.22
0.18
0.35
0.7
Φ1.2
1.55
1.3
3.3
2.7
0.22
0.18
0.35
0.7
Φ1.4
1.75
1.5
3.3
2.7
0.27
0.23
0.4
0.8
Φ1.6
2.05
1.8
4.375
3.625
0.27
0.23
0.45
0.9
Φ1.7
2.05
1.8
4.375
3.625
0.27
0.23
0.45
0.9
Φ1.8
2.15
1.9
4.375
3.625
0.27
0.23
0.45
0.9
Φ2
2.45
2.2
4.875
4.125
0.33
0.27
0.5
1
Φ2.3
2.75
2.5
5.375
4.625
0.33
0.27
0.5
1
Φ2.5
3.05
2.8
5.875
5.125
0.33
0.27
0.55
1.1
Φ2.6
3.05
2.8
5.875
5.125
0.33
0.27
0.55
1.1
Φ3
3.5
3.2
6.375
5.625
0.45
0.35
0.65
1.3
Φ3.5
4
3.7
7.45
6.55
0.45
0.35
0.7
1.4
Φ4
4.6
4.3
8.45
7.55
0.55
0.45
0.8
1.6
Φ5
5.6
5.3
10.45
9.55
0.55
0.45
0.9
1.8
Φ6
6.76
6.4
11.55
10.45
0.55
0.45
1.1
2.2
Φ7
7.76
7.4
12.55
11.45
0.55
0.45
1.2
2.4
Φ8
8.76
8.4
15.55
14.45
0.55
0.45
1.7
3.4
Φ10
10.93
10.5
18.55
17.45
0.86
0.74
2
4
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