Dimension drawing
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GB/T 70-1976
Hexagon socket head cap screws
Nom
P
dk max
dk min
k max
k min
s max
s min
t min
t max
r
e
M4
0.5|0.7
7
6.8
4.24
3.76
3.12
3.02
2
2.6
0.4
3.5
M5
0.5|0.8
8.5
8.3
5.24
4.76
4.16
4.03
2.5
3.1
0.4
4.6
M6
0.75|1
10
9.8
6.24
5.76
5.16
5.03
3
3.6
0.4
5.8
M8
1|1.25
12.5
12.26
8.29
7.71
6.16
6.03
4
4.75
0.4
6.9
M10
1|1.25|1.5
15
14.76
10.29
9.71
8.2
8.04
5
5.75
0.5
9.2
M12
1|1.25|1.5|1.75
18
17.76
12.35
11.65
10.2
10.04
6
6.75
0.6
11.5
M14
1|1.5|2
21
20.72
14.35
13.65
12.24
12.05
7
7.9
0.6
13.8
M16
1|1.5|2
24
23.72
16.35
15.65
12.24
12.05
8
8.9
0.6
13.8
M18
1.5|2|2.5
27
26.72
18.35
17.65
14.24
14.05
9
9.9
0.8
16.2
M20
1.5|2|2.5
30
29.72
20.42
19.58
14.24
14.05
10
10.9
0.8
16.2
M22
1.5|2|2.5
33
32.66
22.42
21.58
17.24
17.05
11
12.1
0.8
19.6
M24
1.5|2|3
36
35.66
24.42
23.58
17.24
17.05
12
13.1
1
19.6
M27
1.5|2|3
40
39.66
27.42
26.58
19.28
19.06
14
15.1
1
22
M30
1.5|2|3.5
42
41.66
30.42
29.58
19.28
19.06
15
16.1
1
22
M36
1.5|2|3|4
50
49.66
36.5
35.5
24.28
24.06
18
19.1
1.6
27.7
M42
1.5|2|3|4|4.5
58
57.6
42.5
41.5
27.28
27.06
21
22.3
1.6
31.2
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