六角螺母 C级 （摘自GB/T 41-2000）
螺纹规格为M5～M64、性能等级为4和5级、产品等级为C级的六角螺母。
标记示例：
螺纹规格D＝M12、性能等级为5级、不经表面处理、产品等级为C级的六角螺母的标记：
螺母 GB/T 41 M12
螺纹规格为M5～M64的六角螺母：
螺纹规格
D
|
P1)
|
dw
min
|
e
min
|
m
|
mw
min
|
s
|
max
|
min
|
公称=max
|
min
|
M5
|
0.8
|
6.7
|
8.63
|
5.6
|
4.4
|
3.5
|
8
|
7.64
|
M6
|
1
|
8.7
|
10.89
|
6.4
|
4.9
|
3.7
|
10
|
9.64
|
M8
|
1.25
|
11.5
|
14.2
|
7.9
|
6.4
|
5.1
|
13
|
12.57
|
M10
|
1.5
|
14.5
|
17.59
|
9.5
|
8
|
6.4
|
16
|
15.57
|
M12
|
1.75
|
16.5
|
19.85
|
12.2
|
10.4
|
8.3
|
18
|
17.57
|
M16
|
2
|
22
|
26.17
|
15.9
|
14.1
|
11.3
|
24
|
23.16
|
M20
|
2.5
|
27.7
|
32.95
|
19
|
16.9
|
13.5
|
30
|
29.16
|
M24
|
3
|
33.3
|
39.55
|
22.3
|
20.2
|
16.2
|
36
|
35
|
M30
|
3.5
|
42.8
|
50.85
|
26.4
|
24.3
|
19.4
|
46
|
45
|
M36
|
4
|
51.1
|
60.79
|
31.9
|
29.4
|
23.2
|
55
|
53.8
|
M42
|
4.5
|
60
|
71.3
|
34.9
|
32.4
|
25.9
|
65
|
63.1
|
M48
|
5
|
69.5
|
82.6
|
38.9
|
36.4
|
29.1
|
75
|
73.1
|
M56
|
5.5
|
78.7
|
93.56
|
45.9
|
43.4
|
34.7
|
85
|
82.8
|
M64
|
6
|
88.2
|
104.86
|
52.4
|
49.4
|
39.5
|
95
|
92.8
|
注：1)P—螺距
非优选的螺纹规格
螺纹规格
D
|
P1)
|
dw
min
|
e
min
|
m
|
mw
min
|
s
|
max
|
min
|
公称=max
|
min
|
M14
|
2
|
19.2
|
22.78
|
13.9
|
12.1
|
9.7
|
21
|
20.16
|
M18
|
2.5
|
24.9
|
29.56
|
16.9
|
15.1
|
12.1
|
27
|
26.16
|
M22
|
2.5
|
31.4
|
37.29
|
20.2
|
18.1
|
14.5
|
34
|
33
|
M27
|
3
|
38
|
45.2
|
24.7
|
22.6
|
18.1
|
41
|
40
|
M33
|
3.5
|
46.6
|
55.37
|
29.5
|
27.4
|
21.9
|
50
|
49
|
M39
|
4
|
55.9
|
66.44
|
34.3
|
31.8
|
25.4
|
60
|
58.8
|
M45
|
4.5
|
64.7
|
76.95
|
36.9
|
34.4
|
27.5
|
70
|
68.1
|
M52
|
5
|
74.2
|
88.25
|
42.9
|
40.4
|
32.3
|
80
|
78.1
|
M60
|
5.5
|
83.4
|
99.21
|
48.9
|
46.4
|
37.1
|
90
|
87.8
|
注：1)P—螺距
