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ASME/ANSI B18.13.1M-1-2003
Metric cross recessed pan head screws and spring lock washers assemblies-Table 1
Nom
P
dk max
dk min
k max
k min
M
No.
t
d1 max
d1 min
b min
h min
dc max
dc min
M2.5
0.45
5
4.7
2.1
1.9
2.62
1
1.58
2.35
2.22
1.19
0.79
4.81
4.6
M3
0.5
5.6
5.3
2.4
2.2
2.86
1
1.83
2.84
2.69
1.4
1.02
5.73
5.49
M3.5
0.6
7
6.6
2.6
2.3
3.9
2
2.14
3.3
3.15
1.4
1.02
6.19
5.95
M4
0.7
8
7.6
3.1
2.8
4.36
2
2.54
3.76
3.6
1.57
1.19
7
6.74
M5
0.8
9.5
9.1
3.7
3.4
4.76
2
2.94
4.67
4.52
1.78
1.42
8.34
8.08
M6
1
12
11.5
4.6
4.3
6.8
3
3.84
5.62
5.44
2.79
1.96
11.3
11.02
M8
1.25
16
15.5
6
5.6
8.82
4
4.96
7.75
7.36
3.3
2.46
14.29
13.96
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