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JIS B1188-4-1995
Cross recessed truss head screw ,plain washer and external teeth serrated lock washer 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
dc1 max
dc1 min
h1 max
h1 min
H
Number of teeth min
M3
0.5
6.9
6.4
2.05
1.75
1
2.9
1.72
1.34
7
6.65
0.55
0.45
6.5
6.1
0.485
0.415
0.9
8
M3.5
0.6
8.1
7.6
2.35
2.05
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
9.4
8.9
2.65
2.35
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
11.8
11.2
3.25
2.95
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
14
13.3
3.9
3.5
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
17.8
17
5
4.6
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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