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GB/T 9074.30-1988
Big wasner for tapping screw assembly
Nom
d max
d min
dc max
dc min
h min
h max
Φ2.9
2.56
2.46
9
8.64
0.9
1.1
Φ3.5
3.12
3
11
10.57
0.9
1.1
Φ4.2
3.67
3.55
12
11.57
0.9
1.1
Φ4.8
4.12
4
15
14.57
1.4
1.8
Φ5.5
4.82
4.7
15
14.57
1.4
1.8
Φ6.3
5.52
5.4
18
17.57
1.4
1.8
Φ8
7.27
7.15
21
20.48
1.8
2.2
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