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UNI 7910
Cross recessed countersunk head tapping screws with rapid thread-type H
Nom
P
dk max
dk min
k max
k min
M
t max
t min
ST3
2.1
4.9
4.6
1.5
0.6
2.7
1.6
1.3
ST3.5
2.5
5.5
5.2
1.7
0.9
3.4
2.21
1.81
ST4
2.7
6.8
6.44
2.1
1.2
4.6
2.39
1.89
ST4.5
2.8
7.5
7.14
2.3
1.3
4.7
2.54
2.04
ST5
3
8.1
7.74
2.5
1.4
4.9
2.74
2.24
ST5.5
3
9.5
9.14
3
1.5
5.4
3.2
2.7
ST6
3.1
10.8
10.37
3.4
1.7
7
3.53
3.02
ST7
3.5
12.4
11.97
3.8
2
7.4
3.96
3.46
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