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ASME/ANSI B18.6.5M-21-2010
Type BF metric hex flange head self tapping cutting screw-Table 21
Nom
P
s max
s min
e min
dc max
dc min
k max
da max
r min
d max
d min
d1 max
d1 min
d2 max
d2 min
ST2.2
0.8
3
2.84
3.16
4.5
4.1
2.2
2.8
0.1
2.24
2.1
1.63
1.52
1.47
1.37
ST2.9
1
4
3.84
4.27
6.4
5.9
3.2
3.5
0.1
2.9
2.76
2.18
2.08
2.01
1.88
ST3.5
1.3
5
4.82
5.36
7.5
6.9
3.8
4.1
0.1
3.53
3.35
2.64
2.51
2.41
2.26
ST4.2
1.4
5.5
5.32
5.92
8.5
7.8
4.3
4.9
0.2
4.22
4.04
3.1
2.95
2.84
2.69
ST4.8
1.6
7
6.78
7.55
10
9.3
5.2
5.5
0.2
4.8
4.62
3.58
3.43
3.3
3.12
ST5.5
1.8
7
6.78
7.55
11.2
10.3
6
6.3
0.2
5.46
5.28
4.17
3.99
3.86
3.68
ST6.3
1.8
8
7.78
8.66
12.8
1.8
6.7
7.1
0.3
6.25
6.03
4.88
4.7
4.55
4.34
ST8
2.1
10
9.78
10.89
16.8
15.5
8.6
9.2
0.4
8
7.78
6.2
5.99
5.84
5.64
ST9.5
2.1
13
12.72
14.16
21
19.3
10.7
10.7
0.4
9.65
9.43
7.85
7.59
7.44
7.24
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