球面六角螺母 （摘自GB 804-88）
螺纹规格为M6～M48的球面六角螺母。
标记示例：
螺纹规格D＝M20、机械性能为8级、表面氧化的球面六角螺母的标记：
螺纹规格为M6～M48的球面六角螺母：
|
螺纹规格
D
|
da
|
d1
|
e
min
|
m
|
m′
|
R
|
s
|
|
max
|
min
|
max
|
min
|
max
|
min
|
|
M6
|
6.75
|
6
|
7.5
|
11.05
|
10.29
|
9.71
|
7.77
|
10
|
10
|
9.78
|
|
M8
|
8.75
|
8
|
9.5
|
14.38
|
12.35
|
11.65
|
9.32
|
12
|
13
|
12.73
|
|
M10
|
10.8
|
10
|
11.5
|
17.77
|
16.35
|
15.65
|
12.52
|
16
|
16
|
15.73
|
|
M12
|
13
|
12
|
14
|
20.03
|
20.42
|
19.58
|
15.66
|
20
|
18
|
17.73
|
|
M16
|
17.3
|
16
|
18
|
26.75
|
25.42
|
24.58
|
19.66
|
25
|
24
|
23.67
|
|
M20
|
21.6
|
20
|
22
|
32.95
|
32.5
|
31.5
|
25.2
|
32
|
30
|
29.16
|
|
M24
|
25.9
|
24
|
26
|
39.85
|
38.5
|
37.5
|
30.0
|
36
|
36
|
35
|
|
M30
|
32.4
|
30
|
32
|
50.85
|
48.5
|
47.5
|
38.0
|
40
|
46
|
45
|
|
M36
|
38.9
|
36
|
38
|
6079
|
55.6
|
54.4
|
43.52
|
50
|
55
|
53.8
|
|
M42
|
45.4
|
42
|
44
|
72.09
|
65.6
|
64.4
|
51.52
|
63
|
65
|
63.8
|
|
M48
|
51.8
|
48
|
50
|
82.6
|
75.6
|
74.4
|
59.52
|
70
|
75
|
73.1
|
