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JIS B1188-1-2017
Cross recessed pan head screw and conical spring washers assemblies-Table 1
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
5.5
5
2.15
1.85
2
3.6
1.43
0.86
7
6.75
0.535
0.465
0.75
M4
0.7
7
6.5
2.75
2.45
2
4.2
2.03
1.45
9
8.75
0.745
0.655
0.95
M5
0.8
9
8.4
3.45
3.15
2
4.9
2.73
2.14
10
9.75
0.85
0.75
1.1
M6
1
10.5
9.8
4.1
3.7
3
6.3
2.86
2.26
12.5
12.2
1.055
0.945
1.35
M8
1.25
14
13.2
5.4
5
3
7.8
4.36
3.73
17
16.7
1.47
1.33
1.85
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