2型六角开槽螺母 细牙 A和B级 （摘自GB 9458-88）
螺纹规格为M8×1～M36×3、细牙、A和B级的2型六角开槽螺母。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=M8×1、性能等级为8级、表面氧化A级的2型六角开槽细牙螺母的标记：
螺母 GB 9458 M8×1
螺纹规格为M8×1～M36×3、细牙的2型六角开槽螺母：
|
螺纹规格
|
da
|
de
|
dw
|
e
|
m
|
m′
|
n
|
s
|
W
|
开口销
|
|
D×P
|
max
|
min
|
max
|
min
|
min
|
min
|
max
|
min
|
min
|
max
|
min
|
max
|
min
|
max
|
min
|
|
M8×1
|
8.75
|
8
|
-
|
-
|
11.6
|
14.38
|
10.5
|
10.07
|
5.71
|
3.1
|
2.5
|
13
|
12.73
|
7.5
|
7.14
|
2×16
|
|
M10×1
(M10×1.25)
|
10.8
|
10
|
-
|
-
|
14.6
|
17.77
|
13.3
|
12.87
|
7.15
|
3.4
|
2.8
|
16
|
15.73
|
9.3
|
8.94
|
2.5×20
|
|
M12×1.5
(M12×1.25)
|
13
|
12
|
-
|
-
|
16.6
|
20.03
|
17
|
16.57
|
9.26
|
4.25
|
3.5
|
18
|
17.73
|
12
|
11.57
|
3.2×22
|
|
(M14×1.5)
|
15.1
|
14
|
-
|
-
|
19.6
|
23.354
|
19.1
|
18.58
|
10.7
|
4.25
|
3.5
|
21
|
20.67
|
14.1
|
13.67
|
3.2×26
|
|
M16×1.5
|
17.3
|
16
|
-
|
-
|
22.5
|
26.75
|
22.4
|
21.88
|
12.6
|
5.7
|
4.5
|
24
|
23.67
|
16.4
|
15.97
|
4×28
|
|
(M18×1.5)
|
19.5
|
18
|
25
|
24.16
|
24.8
|
29.56
|
23.6
|
22.76
|
13.5
|
5.7
|
4.5
|
27
|
26.16
|
17.6
|
16.9
|
4×32
|
|
M20×2
(M20×1.5)
|
21.6
|
20
|
28
|
27.16
|
27.7
|
32.95
|
26.3
|
25.46
|
15.2
|
5.7
|
4.5
|
30
|
29.16
|
20.3
|
19.46
|
4×36
|
|
(M22×1.5)
|
23.7
|
22
|
30
|
29.16
|
31.4
|
37.29
|
29.8
|
28.96
|
16.4
|
6.7
|
5.5
|
34
|
33
|
21.8
|
20.5
|
5×40
|
|
M24×2
|
25.9
|
24
|
34
|
33
|
33.2
|
39.55
|
31.9
|
30.9
|
18.1
|
6.7
|
5.5
|
36
|
35
|
23.9
|
23.06
|
5×40
|
|
(M27×2)
|
29.1
|
27
|
38
|
37
|
38
|
45.2
|
34.7
|
33.7
|
20.3
|
6.7
|
5.5
|
41
|
40
|
26.7
|
25.4
|
5×45
|
|
M30×2
|
32.4
|
30
|
42
|
41
|
42.7
|
50.85
|
37.6
|
36.6
|
21.8
|
8.5
|
7
|
46
|
45
|
28.6
|
27.76
|
6.3×50
|
|
(M33×2)
|
35.6
|
33
|
46
|
45
|
46.6
|
55.37
|
41.5
|
40.5
|
24.7
|
8.5
|
7
|
50
|
49
|
32.5
|
30.9
|
6.3×50
|
|
M36×3
|
38.9
|
36
|
50
|
49
|
51.1
|
60.79
|
43.7
|
42.7
|
26.5
|
8.5
|
7
|
55
|
53.8
|
34.7
|
33.7
|
6.3×65
|
注：尽可能不采用括号内的规格。
