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JIS B1129-S3-2004
Slotted pan head tapping screws and plain washer assemblies-type C
Nom
P
dk max
dk min
k max
k min
n min
n max
t min
d1 min
d1 max
dc max
dc min
h max
h min
ST2.2
0.8
4
3.7
1.3
1.1
0.56
0.7
0.5
1.9
2
5
4.82
1.06
0.94
ST2.9
1.1
5.6
5.3
1.8
1.6
0.86
1
0.7
2.5
2.6
7
6.64
1.06
0.94
ST3.5
1.3
7
6.6
2.1
1.9
1.06
1.2
0.8
3
3.1
8
7.64
1.06
0.94
ST4.2
1.4
8
7.6
2.4
2.2
1.26
1.51
1
3.55
3.67
9
8.64
1.06
0.94
ST4.8
1.6
9.5
9.1
3
2.7
1.26
1.51
1.2
4
4.12
10
9.64
1.06
0.94
ST5.5
1.8
11
10.6
3.2
2.9
1.66
1.91
1.3
4.7
4.82
12
11.57
1.68
1.52
ST6.3
1.8
12
11.6
3.6
3.3
1.66
1.91
1.4
5.4
5.52
14
13.57
1.68
1.52
ST8
2.1
16
15.6
4.8
4.5
2.06
2.31
1.9
7.15
7.3
16
15.57
1.68
1.52
ST9.5
2.1
20
19.5
6
5.7
2.56
2.81
2.4
8.8
8.95
20
19.48
2.09
1.91
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