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JIS B1188-4-2006
Cross recessed truss head screw and conical spring washers assemblies-Table 4
Nom
P
dk max
dk min
k max
k min
No.
M
t max
t min
dc max
dc min
h max
h min
H
M3
0.5
6.9
6.4
2.05
1.75
1
2.9
1.72
1.34
7
6.75
0.535
0.465
0.75
M4
0.7
9.4
8.9
2.65
2.35
2
4.3
2.13
1.6
9
8.75
0.745
0.655
0.95
M5
0.8
11.8
11.2
3.25
2.95
2
5
2.83
2.29
10
9.75
0.85
0.75
1.1
M6
1
14
13.3
3.9
3.5
3
6.3
2.86
2.31
12.5
12.2
1.055
0.945
1.35
M8
1.25
17.8
17
5
4.6
3
7.8
4.36
3.78
17
16.7
1.47
1.33
1.85
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