1型六角螺母 细牙（摘自GB/T 6171-2000）
螺纹规格为M8×1～M64×4、细牙螺纹、性能等级为6、8、10、A2-50、A2-70、A4-50、A4-70、CU2、CU3和AL4级、产品等级为A和B级的1型六角螺母。
A级用于D≤16mm；B级用于D＞16mm的螺母。
标记示例：
螺纹规格D＝M16×1.5、细牙螺纹、性能等级为8级、表面镀锌钝化、产品等级为A级的1型六角螺母的标记：
螺母 GB/T 6171 M16×1.5
螺纹规格为M8×1～M64×4的1型六角螺母：
螺纹规格
D×P
|
c
|
da
|
dw
min
|
e
min
|
m
|
mw
min
|
s
|
max
|
min
|
max
|
min
|
max
|
min
|
公称=max
|
min
|
M8×1
|
0.6
|
0.15
|
8.75
|
8.00
|
11.63
|
14.38
|
6.8
|
6.44
|
5.15
|
13
|
12.73
|
M10×1
|
0.6
|
0.15
|
10.8
|
10.0
|
14.63
|
17.77
|
8.4
|
8.04
|
6.43
|
16
|
15.73
|
M12×1.5
|
0.6
|
0.15
|
13
|
12
|
16.63
|
20.03
|
10.8
|
10.37
|
8.3
|
18
|
17.73
|
M16×1.5
|
0.8
|
0.2
|
17.3
|
16.0
|
22.49
|
26.75
|
14.8
|
14.1
|
11.28
|
24
|
23.67
|
M20×1.5
|
0.8
|
0.2
|
21.6
|
20.0
|
27.7
|
32.95
|
18
|
16.9
|
13.52
|
30
|
29.16
|
M24×2
|
0.8
|
0.2
|
25.9
|
24.0
|
33.25
|
39.55
|
21.5
|
20.2
|
16.16
|
36
|
35
|
M30×2
|
0.8
|
0.2
|
32.4
|
30.0
|
42.75
|
50.85
|
25.6
|
24.3
|
19.44
|
46
|
45
|
M36×3
|
0.8
|
0.2
|
38.9
|
36.0
|
51.11
|
60.79
|
31
|
29.4
|
23.52
|
55
|
53.8
|
M42×3
|
1
|
0.3
|
45.4
|
42.0
|
59.95
|
71.3
|
34
|
32.4
|
25.92
|
65
|
63.1
|
M48×3
|
1
|
0.3
|
51.8
|
48.0
|
69.45
|
82.6
|
38
|
36.4
|
29.12
|
75
|
73.1
|
M56×4
|
1
|
0.3
|
60.5
|
56.0
|
78.66
|
93.56
|
45
|
43.4
|
34.72
|
85
|
82.8
|
M64×4
|
1
|
0.3
|
69.1
|
64.0
|
88.16
|
104.86
|
51
|
49.1
|
39.28
|
95
|
92.8
|
非优选的螺纹规格
螺纹规格
D×P
|
c
|
da
|
dw
min
|
e
min
|
m
|
mw
min
|
s
|
max
|
min
|
max
|
min
|
max
|
min
|
公称=max
|
min
|
M10×1.25
|
0.60
|
0.15
|
10.8
|
10.0
|
14.63
|
17.77
|
8.40
|
8.04
|
6.43
|
16.00
|
15.73
|
M12×1.25
|
0.60
|
0.15
|
13
|
12
|
16.63
|
20.03
|
10.80
|
10.37
|
8.3
|
18.00
|
17.73
|
M14×1.5
|
0.60
|
0.15
|
15.1
|
14.0
|
19.64
|
23.36
|
12.8
|
12.1
|
9.68
|
21.00
|
20.67
|
M18×1.5
|
0.8
|
0.2
|
19.5
|
18.0
|
24.85
|
29.56
|
15.8
|
15.1
|
12.08
|
27.00
|
26.16
|
M20×2
|
0.8
|
0.2
|
21.6
|
20.0
|
27.7
|
32.95
|
18.0
|
16.9
|
13.52
|
30.00
|
29.16
|
M22×1.5
|
0.8
|
0.2
|
23.7
|
22.0
|
31.35
|
37.29
|
19.4
|
18.1
|
14.48
|
34
|
33
|
M27×2
|
0.8
|
0.2
|
29.1
|
27.0
|
38
|
45.2
|
23.8
|
22.5
|
18
|
41
|
40
|
M33×2
|
0.8
|
0.2
|
35.6
|
33.0
|
46.55
|
55.37
|
28.7
|
27.4
|
21.92
|
50
|
49
|
M39×3
|
1.0
|
0.3
|
42.1
|
39.0
|
55.86
|
66.44
|
33.4
|
31.8
|
25.44
|
60.0
|
58.8
|
M45×3
|
1.0
|
0.3
|
48.6
|
45.0
|
64.7
|
76.95
|
36.0
|
34.4
|
27.52
|
70.0
|
68.1
|
M52×4
|
1.0
|
0.3
|
56.2
|
52.0
|
74.2
|
88.25
|
42.0
|
40.4
|
32.32
|
80.0
|
78.1
|
M60×4
|
1.0
|
0.3
|
64.8
|
60.0
|
83.41
|
99.21
|
48.0
|
46.4
|
37.12
|
90.0
|
87.8
|
