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JIS B1188-5-2017
Cross recessed binding head screw ，plain washer and external teeth serrated lock washer assemblies-Table 5
Nom
P
dk max
dk min
k
f max
f min
No.
M
t max
t min
dc max
dc min
h max
h min
dc1 max
dc1 min
h1 max
h1 min
H
Number of teeth min
M3
0.5
6.3
5.8
1.3
0.7
0.5
2
3.7
1.53
1.01
7
6.65
0.55
0.45
6.5
6.1
0.485
0.415
0.9
8
M3.5
0.6
7.3
6.8
1.5
0.85
0.55
2
4
1.83
1.3
9
8.65
0.55
0.45
7.5
7.1
0.485
0.415
0.9
8
M4
0.7
8.3
7.8
1.7
0.95
0.65
2
4.3
2.13
1.6
9
8.65
0.9
0.7
8.5
8.1
0.485
0.415
0.9
9
M5
0.8
10.3
9.7
2.1
1.15
0.85
2
5
2.83
2.29
10
9.65
1.1
0.9
10
9.6
0.64
0.56
1.2
10
M6
1
12.4
11.7
2.4
1.45
1.15
3
6.3
2.86
2.31
12.5
12.1
1.75
1.45
11
10.5
0.64
0.56
1.2
12
M8
1.25
16.4
15.6
3.1
1.9
1.5
3
7.8
4.36
3.78
17
16.6
1.75
1.45
15
14.5
0.85
0.75
1.6
12
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