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JIS B1255-3-1977
External-internal tooth oversize lock washers-Table 3
Nom
d max
d min
dc max
dc min
h max
h min
Number of internal teeth
Number of external teeth
H
Φ4
4.5
4.3
15
14.5
0.64
0.56
8
12
1.2
Φ4.5
5
4.8
15
14.5
0.64
0.56
8
12
1.2
Φ5
5.5
5.3
15
14.5
0.64
0.56
8
12
1.2
Φ6
6.7
6.4
17.5
17
0.85
0.75
9
12
1.6
Φ8
8.7
8.4
22.5
21.9
0.95
0.85
9
12
1.8
Φ10
10.9
10.5
26
25.4
1.055
0.945
9
14
2
Φ12
12.9
12.5
29
28.4
1.055
0.945
10
14
2
Φ14
14.9
14.5
32
31.2
1.265
1.135
10
14
2.4
Φ16
16.9
16.5
35
34.2
1.47
1.33
12
16
2.8
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