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GB/T 9074.3-1988
Cross recessed pan head screws and spring washers assemblies
Nom
P
dk max
dk min
k max
k min
No.
M
t min
t max
d1 max
d1 min
h min
h max
b1 min
b1 max
H max
H min
M3
0.5
5.6
5.3
2.4
2.26
1
3
1.4
1.8
2.83
2.69
0.7
0.9
1.1
1.3
2
1.6
M4
0.7
8
7.64
3.1
2.92
2
4.4
1.9
2.4
3.78
3.6
1
1.2
1.4
1.6
2.75
2.2
M5
0.8
9.5
9.14
3.7
3.52
2
4.9
2.4
2.9
4.75
4.45
1.2
1.4
1.9
2.1
3.25
2.6
M6
1
12
11.57
4.6
4.30
3
6.9
3.1
3.6
5.71
5.41
1.5
1.7
2.35
2.65
4
3.2
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