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JB/T 6686-1993
12-Piont flange bolts
Nom
P
dc max
dc min
ds max
ds min
e min
h max
h min
k max
k min
r max
r min
s max
s min
M6
1
9.5
9.14
6
5.85
8.1
1.9
1.65
6.51
6.29
0.4
0.28
7
6.85
M8
1.25
12.6
12.17
8
7.85
9.2
2.14
1.89
8.11
7.89
0.4
0.28
8
7.85
M10
1.5
14.3
13.87
10
9.85
11.5
3.52
3.22
9.61
9.39
0.5
0.38
10
9.85
M12
1.75
19
18.48
12
11.82
13.8
4.35
4.05
12.83
12.57
0.8
0.55
12
11.82
M14
2
21.4
20.88
14
13.82
16.2
5.15
4.79
15.13
14.87
0.8
0.55
14
13.82
M16
2
23.8
23.28
16
15.82
19.6
5.94
5.58
16.03
15.77
0.8
0.55
17
16.82
M18
2.5
26.2
25.68
18
17.82
21.9
6.91
6.55
18.13
17.87
1
0.75
19
18.79
M20
2.5
28.6
28.08
20
19.79
21.9
6.82
6.46
19.16
18.84
1
0.75
19
18.79
M22
2.5
33.3
32.68
22
21.79
25.4
6.9
6.54
22.36
22.04
1
0.75
22
21.79
M24
3
38.1
37.48
24
23.79
27.7
7.98
7.35
25.56
25.24
1.2
0.95
24
23.79
M27
3
38.1
37.48
27
26.79
27.7
7.98
7.35
25.56
25.24
1.2
0.95
24
23.79
M30
3.5
42.8
42.18
30
29.79
34.6
9.21
8.78
28.96
28.54
1.4
1.15
30
29.79
M33
3.5
47.5
46.88
33
32.75
36.9
9.62
9.19
32
31.6
1.6
1.35
32
31.75
M36
4
52.3
51.56
36
35.75
41.6
10.82
10.39
35.2
34.8
1.6
1.35
36
35.75
M39
4
57
56.26
39
38.75
47.3
12.71
12.28
38.3
37.9
1.8
1.55
41
40.75
M42
4.5
61.7
60.96
42
41.75
47.3
12.56
12.13
41.4
41
1.8
1.55
41
40.75
M45
4.5
66.5
65.76
45
44.75
53.1
15.65
15.13
44.7
44.3
2
1.75
46
45.75
M48
5
76
75.26
48
47.75
57.7
16.1
15.58
51.03
50.57
2.2
1.82
50
49.75
M52
5
76
75.26
52
51.7
57.7
16.1
15.58
51.03
50.57
2.2
1.82
50
49.75
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