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IS 5556-1970
Toothed lock washers with external teeth—Type A
Nom
d min
d max
dc max
dc min
h
Number of teeth min
Φ1.6
1.7
1.84
3.6
3.3
0.3
9
Φ2
2.2
2.34
4.5
4.2
0.3
9
Φ2.5
2.7
2.84
5.5
5.2
0.4
9
Φ3
3.2
3.38
6
5.7
0.4
9
Φ3.5
3.7
3.88
7
6.64
0.5
10
Φ4
4.3
4.48
8
7.64
0.5
11
Φ5
5.3
5.48
10
9.64
0.6
11
Φ6
6.4
6.62
11
10.57
0.7
12
Φ7
7.4
7.62
12.5
12.07
0.8
14
Φ8
8.4
8.62
15
14.57
0.8
14
Φ10
10.5
10.77
18
17.57
0.9
16
Φ12
13
13.27
20.5
19.98
1
16
Φ14
15
15.27
24
23.48
1
18
Φ16
17
17.27
26
25.48
1.2
18
Φ18
19
19.33
30
29.48
1.4
18
Φ20
21
21.33
33
32.38
1.4
20
Φ22
23
23.33
36
35.38
1.5
20
Φ24
25
25.33
38
37.38
1.5
20
Φ27
28
28.33
44
43.38
1.6
22
Φ30
31
31.39
48
47.38
1.6
22
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