六角头不脱出螺钉 (摘自GB 838-88)
螺纹规格为M5~M16的六角头不脱出螺钉。
标记示例:
螺纹规格d=M6、公称长度l=20mm、性能等级为4.8级、不经表面处理的六角头不脱出螺钉的标记:
螺钉 GB 838 M6×20
螺纹规格为M5~M16的六角头不脱出螺钉:
螺纹规格
d
|
d1
|
S
|
K
|
b
|
r
min
|
C
|
e
min
|
l
|
max
|
min
|
max
|
min
|
公称
|
min
|
max
|
M5
|
3.5
|
3.32
|
8
|
7.78
|
3.5
|
3.35
|
3.65
|
8
|
0.2
|
1.6
|
8.79
|
14~40
|
M6
|
4.5
|
4.32
|
10
|
9.78
|
4
|
3.85
|
4.15
|
10
|
0.25
|
2
|
11.05
|
20~50
|
M8
|
5.5
|
5.32
|
13
|
12.73
|
5.3
|
5.15
|
5.45
|
12
|
0.4
|
2.5
|
14.38
|
25~65
|
M10
|
7
|
6.78
|
16
|
15.73
|
6.4
|
6.22
|
6.58
|
15
|
0.4
|
3
|
17.77
|
30~80
|
M12
|
9
|
8.78
|
18
|
17.73
|
7.5
|
7.32
|
7.68
|
18
|
0.6
|
4
|
20.03
|
30~100
|
(M14)
|
11
|
10.73
|
21
|
20.67
|
8.8
|
8.62
|
8.98
|
20
|
0.6
|
5
|
23.35
|
35~100
|
M16
|
12
|
11.73
|
24
|
23.67
|
10
|
9.82
|
10.18
|
24
|
0.6
|
6
|
26.75
|
40~100
|
注:尽可能不采用括号内的规格。
l的范围:
公称
|
(14)
|
16
|
20
|
25
|
30
|
35
|
40
|
45
|
50
|
(55)
|
60
|
(65)
|
70
|
75
|
80
|
90
|
100
|
min
|
13.65
|
15.65
|
19.58
|
24.58
|
29.58
|
34.50
|
39.50
|
44.50
|
49.50
|
54.05
|
59.05
|
64.05
|
69.05
|
74.05
|
79.05
|
88.90
|
98.90
|
max
|
14.35
|
16.35
|
20.42
|
25.42
|
30.42
|
35.50
|
40.50
|
45.50
|
50.50
|
55.95
|
60.95
|
65.95
|
70.95
|
75.95
|
80.95
|
91.10
|
101.10
|