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GB/T 97.4-2002
Plain washers(Normal)for screw and washer assemblies
Nom
d min
d max
dc max
dc min
h max
h min
Φ2
1.75
1.85
5
4.7
0.65
0.55
Φ2.5
2.25
2.35
6
5.7
0.65
0.55
Φ3
2.75
2.85
7
6.64
0.65
0.55
Φ3.5
3.2
3.32
8
7.64
0.85
0.75
Φ4
3.6
3.72
9
8.64
0.85
0.75
Φ5
4.55
4.67
10
9.64
1.06
0.94
Φ6
5.5
5.62
12
11.57
1.68
1.52
Φ8
7.4
7.55
16
15.57
1.68
1.52
Φ10
9.3
9.52
20
19.48
2.09
1.91
Φ12
11
11.27
24
23.48
2.6
2.4
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