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ASME/ANSI B18.13.1M-1-1998
Metric hex socket heads cap screws with two holes on the head and spring lock washers assemblies-Table 1
Nom
P
dk max
dk min
k max
k min
s max
s min
e min
t min
k1 max
k1 min
d1 max
d1 min
d2 max
d2 min
b min
h min
dc max
dc min
M3
0.5
5.5
5.32
3
2.89
2.56
2.52
2.87
1.5
1.2
0.8
0.95
0.8
2.84
2.69
1.08
0.92
5.09
4.85
M4
0.7
7
6.8
4
3.88
3.071
3.02
3.44
2
1.6
1.2
1.35
1.2
3.76
3.6
1.33
1.13
6.52
6.26
M5
0.8
8.5
8.27
5
4.86
4.084
4.02
4.58
2.5
2
1.5
1.35
1.2
4.67
4.52
1.57
1.33
7.92
7.66
M6
1
10
9.74
6
5.85
5.084
5.02
5.72
3
2.3
1.8
1.35
1.2
5.62
5.44
1.82
1.55
9.36
9.08
M8
1.25
13
12.7
8
7.83
6.095
6.02
6.86
4
2.7
2.2
1.35
1.2
7.75
7.36
2.32
1.97
12.33
12
M10
1.5
16
15.67
10
9.81
8.115
8.025
9.15
5
3.3
2.8
1.65
1.5
9.41
9.17
2.78
2.36
15.1
14.73
M12
1.75
18
17.63
12
11.79
10.127
10.025
11.5
6
4
3.5
1.65
1.5
11.33
11.08
2.78
2.36
17.05
16.64
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