六角开槽薄螺母—A和B级 (摘自GB 6181-86)
螺纹规格为M5~M36、A和B级的六角开槽薄螺母。A级用于D≤16的螺母;B级用于D>16的螺母。
标记示例:
螺纹规格D=M12、性能等级为04级、不经表面处理、A级的六角开槽薄螺母的标记:
螺母 GB 6181 M12
螺纹规格为M5~M36、A和B级的六角开槽薄螺母
螺纹规格D
|
da
|
dw
|
e
|
m
|
m′
|
n
|
s
|
W
|
开口销
|
max
|
min
|
min
|
min
|
max
|
min
|
min
|
max
|
min
|
max
|
min
|
max
|
min
|
M5
|
5.75
|
5
|
6.9
|
8.79
|
5.1
|
4.8
|
26.5
|
2
|
1.4
|
8
|
7.78
|
3.1
|
2.8
|
1.2×12
|
M6
|
6.75
|
6
|
8.9
|
11.05
|
5.7
|
5.4
|
21.8
|
2.6
|
2
|
10
|
9.78
|
3.2
|
2.9
|
1.6×14
|
M8
|
8.75
|
8
|
11.6
|
14.38
|
7.5
|
7.14
|
18.1
|
3.1
|
2.5
|
13
|
12.73
|
4.5
|
4.2
|
2×16
|
M10
|
10.8
|
10
|
14.6
|
17.77
|
9.3
|
8.94
|
15.2
|
3.4
|
2.8
|
16
|
15.73
|
5.3
|
5
|
2.5×20
|
M12
|
13
|
12
|
16.6
|
20.03
|
12
|
11.57
|
12.6
|
4.25
|
3.5
|
18
|
17.73
|
7
|
6.64
|
3.2×22
|
(M14)
|
15.1
|
14
|
19.6
|
23.35
|
14.1
|
13.4
|
10.7
|
4.25
|
3.5
|
21
|
20.67
|
9.1
|
8.74
|
3.2×26
|
M16
|
17.3
|
16
|
22.5
|
26.75
|
16.4
|
15.7
|
9.26
|
5.7
|
4.5
|
24
|
23.67
|
10.4
|
9.79
|
4×28
|
M20
|
21.6
|
20
|
27.7
|
32.95
|
20.3
|
19
|
7.15
|
5.7
|
4.5
|
30
|
29.16
|
14.3
|
13.6
|
4×36
|
M24
|
25.9
|
24
|
33.2
|
39.55
|
23.9
|
22.6
|
5.71
|
6.7
|
5.5
|
36
|
35
|
15.9
|
15.2
|
5×40
|
M30
|
32.4
|
30
|
42.7
|
50.85
|
28.6
|
27.3
|
4.32
|
8.5
|
7
|
46
|
45
|
19.6
|
18.76
|
6.3×50
|
M36
|
38.9
|
36
|
51.1
|
60.79
|
34.7
|
33.1
|
3.84
|
8.5
|
7
|
55
|
53.8
|
25.7
|
24.86
|
6.3×65
|
注:尽可能不采用括号内的规格。