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JIS B1130-S4-2012
Hexagon socket heads cap screws and large plain washer assemblies
Nom
P
dk max
dk min
e min
k max
k min
s max
s min
t min
d1 min
d1 max
dc max
dc min
h max
h min
M2
0.4
3.8
3.62
1.733
2
1.86
1.58
1.52
1
1.75
1.85
6
5.7
0.65
0.55
M2.5
0.45
4.5
4.32
2.303
2.5
2.36
2.08
2.02
1.1
2.25
2.35
8
7.64
0.65
0.55
M3
0.5
5.5
5.32
2.873
3
2.86
2.58
2.52
1.3
2.75
2.85
9
8.64
0.85
0.75
M4
0.7
7
6.78
3.443
4
3.82
3.08
3.02
2
3.6
3.72
12
11.57
1.06
0.94
M5
0.8
8.5
8.28
4.583
5
4.82
4.095
4.02
2.5
4.55
4.67
15
14.57
1.06
0.94
M6
1
10
9.78
5.723
6
5.7
5.14
5.02
3
5.5
5.62
18
17.57
1.68
1.52
M8
1.25
13
12.73
6.863
8
7.64
6.14
6.02
4
7.4
7.55
24
23.48
2.09
1.91
M10
1.5
16
15.73
9.149
10
9.64
8.175
8.025
5
9.3
9.52
30
29.48
2.6
2.4
M12
1.75
18
17.73
11.429
12
11.57
10.175
10.025
6
11
11.27
37
36.38
3.11
2.89
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