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ASME/ANSI B18.2.7.1M-2002
Type A 12-Piont flange screws
Nom
P
ds max
ds min
dc max
h min
k max
d1 max
d1 min
d2 max
d2 min
da max
Lf max
r max
r min
M5
0.8
5
4.82
9.4
1.7
5
5.86
5.71
5.22
5.07
6.1
1.4
0.25
0.1
M6
1
6
5.82
11.3
2.1
6
7.02
6.82
6.26
6.06
7.4
1.6
0.29
0.12
M8
1.25
8
7.78
15
2.7
8
9.37
9.17
8.34
8.14
10.1
2.1
0.36
0.16
M10
1.5
10
9.78
18.6
3.4
10
11.7
11.5
10.42
10.22
12.5
2.1
0.45
0.2
M12
1.75
12
11.73
22.8
4.1
12
14.04
13.84
12.5
12.3
15.7
2.1
0.54
0.24
M14
2
14
13.73
26.4
4.8
14
16.29
16.06
14.59
14.36
18.1
2.1
0.63
0.28
M16
2
16
15.73
30.3
5.7
16
18.71
18.48
16.66
16.43
20.5
3.2
0.72
0.32
M20
2.5
20
19.67
37.4
7.2
20
23.4
23.17
20.83
20.6
26.1
4.2
0.9
0.4
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