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GB/T 9074.8G-1988
Cross recessed small pan head screw, large plain and spring washer assemblies
Nom
P
dk max
dk min
k max
k min
No.
M
t max
t min
d1 max
d1 min
h min
h max
b1 min
b1 max
H max
H min
d2 max
d2 min
dc max
dc min
h1 min
h1 max
M2.5
0.45
4.5
4.2
1.8
1.66
1
2.6
1.42
1
2.34
2.2
0.52
0.68
0.9
1.1
1.5
1.2
2.34
2.24
8
7.6
0.4
0.6
M3
0.5
5.5
5.2
2.15
2.01
2
3.5
1.43
0.86
2.83
2.69
0.7
0.9
1.1
1.3
2
1.6
2.83
2.73
9
8.64
0.7
0.9
M4
0.7
7
6.64
2.75
2.61
2
4.1
2.03
1.45
3.78
3.6
1
1.2
1.4
1.6
2.75
2.2
3.78
3.66
12
11.57
0.9
1.1
M5
0.8
9
8.64
3.45
3.27
3
4.8
2.73
2.14
4.75
4.45
1.2
1.4
1.9
2.1
3.25
2.6
4.75
4.57
15
14.57
1
1.4
M6
1
10.5
10.07
4.1
3.8
3
6.2
2.86
2.26
5.71
5.41
1.5
1.7
2.35
2.65
4
3.2
5.71
5.53
18
17.57
1.4
1.8
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