盖形螺母(摘自GB 923-88)
螺纹规格为M3~M24的盖形螺母, 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=M10、性能等级为5级、表面氧化的盖形螺母的标记:
螺纹规格为M3~M24的盖形螺母:
螺纹规格
D
|
e
|
e1
|
a
min
|
m
|
d1
|
l
|
s
|
R≈
|
h
|
min
|
max
|
max
|
min
|
M5
|
6.01
|
5
|
—
|
6
|
—
|
5
|
5.5
|
5.32
|
2.5
|
2.5
|
M6
|
7.66
|
6
|
—
|
7
|
—
|
5
|
7
|
6.78
|
3
|
3
|
M8
|
8.79
|
7.2
|
2
|
9
|
5.5
|
6
|
8
|
7.78
|
3.6
|
4
|
M10
|
11.05
|
9.2
|
2.5
|
11
|
6.5
|
7
|
10
|
9.78
|
4.6
|
5
|
M12
|
18.38
|
13
|
3
|
15
|
8.5
|
11
|
13
|
12.73
|
6.5
|
6
|
(M14)
|
17.77
|
16
|
4
|
18
|
10.5
|
13
|
16
|
15.73
|
8
|
8
|
M16
|
20.03
|
18
|
4.5
|
22
|
13
|
16
|
18
|
17.73
|
9
|
10
|
(M18)
|
23.35
|
20
|
5
|
24
|
15
|
17
|
21
|
20.67
|
10
|
11
|
M20
|
26.75
|
22
|
5
|
26
|
17
|
19
|
24
|
23.67
|
11.5
|
13
|
(M22)
|
29.56
|
25
|
6
|
29
|
19
|
22
|
27
|
26.19
|
12.5
|
14
|
M24
|
32.95
|
28
|
6
|
32
|
21
|
25
|
30
|
29.16
|
14
|
16
|
M3
|
37.29
|
30
|
6
|
35
|
23
|
26
|
34
|
33
|
15
|
18
|
M4
|
39.55
|
34
|
7
|
38
|
25
|
28
|
36
|
35
|
17
|
19
|
注:尽可能不采用括号内的规格。