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UNI 7688-1977
Cross recessed countersunk head screws with type Z
Nom
P
dk min
dk max
k max
No.
M
t min
t max
M2.5
0.45
4.4
4.7
1.5
1
2.8
1.48
1.73
M3
0.5
5.3
5.6
1.65
1
3
1.76
2.01
M3.5
0.6
6.14
8.5
1.93
2
4
1.6
2.06
M4
0.7
7.14
7.5
2.2
2
4.2
1.85
2.31
M5
0.8
8.84
9.2
2.5
2
4.4
2.05
2.51
M6
1
10.57
11
3
3
6.1
2.46
2.92
M8
1.25
14.07
14.5
4
4
8.5
3.92
4.38
M10
1.5
17.57
18
5
4
9.4
4.77
5.23
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