1型六角开槽螺母—A和B级 (摘自GB 6178-86)
螺纹规格为M4~M36、A和B级的1型六角开槽螺母。A级用于D≤16mm的螺母;B级用于D>16mm的螺母。
标记示例:
螺纹规格D=M12、性能等级为8级、表面氧化、A级的1型六角开槽螺母的标记:
螺母 GB 6178 M12
螺纹规格为M4~M36的1型六角开槽螺母:
螺纹规格D
|
da
|
de
|
de
|
dw
|
e
|
m
|
n
|
s
|
W
|
开口销
|
max
|
min
|
max
|
min
|
min
|
min
|
max
|
min
|
min
|
max
|
max
|
min
|
max
|
min
|
M4
|
4.6
|
4
|
-
|
-
|
5.9
|
7.66
|
5
|
4.7
|
1.2
|
1.8
|
7
|
6.78
|
3.2
|
2.9
|
1×10
|
M5
|
5.75
|
5
|
-
|
-
|
6.9
|
8.79
|
6.7
|
6.34
|
1.4
|
2
|
8
|
7.78
|
4.7
|
4.4
|
1.2×12
|
M6
|
6.75
|
6
|
-
|
-
|
8.9
|
11.05
|
7.7
|
7.34
|
2
|
2.6
|
10
|
9.78
|
5.2
|
4.9
|
1.6×14
|
M8
|
8.75
|
8
|
-
|
-
|
11.6
|
14.38
|
9.8
|
9.44
|
2.5
|
3.1
|
13
|
12.73
|
6.8
|
6.44
|
2×16
|
M10
|
10.8
|
10
|
-
|
-
|
14.6
|
17.77
|
12.4
|
11.97
|
2.8
|
3.4
|
16
|
15.73
|
8.4
|
8.04
|
2.5×20
|
M12
|
13
|
12
|
-
|
-
|
16.6
|
20.03
|
15.8
|
15.37
|
3.5
|
4.25
|
18
|
17.73
|
10.8
|
10.37
|
3.2×22
|
(M14)
|
15.1
|
14
|
-
|
-
|
19.6
|
23.35
|
17.8
|
17.37
|
3.5
|
4.25
|
21
|
20.67
|
12.8
|
12.37
|
3.2×26
|
M16
|
17.3
|
16
|
-
|
-
|
22.5
|
26.75
|
20.8
|
20.28
|
4.5
|
5.7
|
24
|
23.67
|
14.8
|
14.37
|
4×28
|
M20
|
21.6
|
20
|
28
|
27.16
|
27.7
|
32.95
|
24
|
23.16
|
4.5
|
5.7
|
30
|
29.16
|
18
|
17.3
|
4×36
|
M24
|
25.9
|
24
|
34
|
33
|
33.2
|
39.55
|
29.5
|
28.66
|
5.5
|
6.7
|
36
|
35
|
21.5
|
20.66
|
5×40
|
M30
|
32.4
|
30
|
42
|
41
|
42.7
|
50.85
|
34.6
|
33.6
|
7
|
8.5
|
46
|
45
|
25.6
|
24.76
|
6.3×50
|
M36
|
38.9
|
38.9
|
50
|
49
|
51.1
|
60.79
|
40
|
39
|
7
|
8.5
|
55
|
53.8
|
31
|
30
|
6.3×65
|
注:尽可能不采用括号内的规格。