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JIS B2706-1995
Heavy duty conical spring washers
Nom
d max
d min
dc max
dc min
h max
h min
H max
H min
Φ4
4.35
4.2
8
7.85
0.425
0.375
0.7
0.5
Φ5
5.35
5.2
10
9.85
0.525
0.475
0.85
0.65
Φ6
6.35
6.2
12.5
12.3
0.73
0.67
1.1
0.9
Φ7
7.35
7.2
14
13.8
0.83
0.77
1.2
1
Φ8
8.35
8.2
16
15.8
0.94
0.86
1.35
1.15
Φ9
9.35
9.2
18
17.8
1.04
0.96
1.55
1.25
Φ10
10.4
10.2
20
19.75
1.14
1.06
1.7
1.4
Φ11
11.4
11.2
22.5
22.25
1.25
1.15
1.85
1.55
Φ12
12.4
12.2
25
24.75
1.655
1.545
2.3
2
Φ14
14.4
14.2
28
27.75
1.655
1.545
2.4
2.1
Φ16
16.5
16.3
31.5
31.2
1.855
1.745
2.65
2.35
Φ18
18.55
18.3
35.5
35.2
2.055
1.945
2.95
2.65
Φ20
20.65
20.4
40
39.7
2.265
2.135
3.25
2.95
Φ22
22.65
22.4
45
44.7
2.565
2.435
3.7
3.3
Φ25
25.65
25.4
50
49.7
3.08
2.92
4.3
3.9
Φ28
28.75
28.5
56
55.65
3.08
2.92
4.5
4.1
Φ30
31.3
31
63
62.65
3.58
3.42
5.1
4.7
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