内六角圆柱头螺钉 (摘自GB/T 70.1-2000)
螺纹规格为M1.6～M64、性能等级为8.8、10.9、12.9、A2-50、A7-50、A4-50、A4-70、CU2和CU3、产品等级为A级的内六角圆柱头螺钉。
标记示例：
螺纹规格d=M5、公称长度l=20mm、性能等级为8.8级、表面氧化的A级内六角圆柱头螺钉的标记：
螺钉 GB/T 70.1 M5×20
1）内六角口部允许稍许倒角或沉孔。
2）末端倒角，d≤M4的为辗制末端，见GB/T2。
3）不完整螺纹的长度u≤2P。
4）ds适用于规定了lsmin数值的产品。
5）头的顶部棱边可以是圆的或倒角的，由制造者任选。
6）底部棱边可以是圆的或倒角到dw，但均不得有毛刺。
螺纹规格为M1.6～M64的内六角圆柱头螺钉：
|
螺纹规格
d
|
P1)
|
b2)
参考
|
dk
|
da
|
ds
|
e
|
lf
|
K
|
r
|
s
|
t
|
V
|
dw
|
W
|
l8)
|
ls
|
lg
|
|
max
|
min
|
max
|
max
|
min
|
min5)
|
max
|
max
|
min
|
max
|
min
|
min
|
min
|
min
|
max
|
min
|
min
|
|
3)
|
4)
|
6)
|
7)
|
|
M1.6
|
0.35
|
15
|
3
|
3.14
|
2.86
|
2
|
1.6
|
1.46
|
1.73
|
0.34
|
1.6
|
4.46
|
0.1
|
1.5
|
1.545
|
1.560
|
1.520
|
0.7
|
0.16
|
2.72
|
0.55
|
2.5～16
|
2
|
4
|
|
M2
|
0.4
|
16
|
3.8
|
3.98
|
3.62
|
2.6
|
2
|
1.86
|
1.73
|
0.51
|
2
|
1.86
|
0.1
|
1.5
|
1.545
|
1.560
|
1.520
|
1
|
0.2
|
3.48
|
0.55
|
3～20
|
2
|
4
|
|
M2.5
|
0.45
|
17
|
4.5
|
4.68
|
4.32
|
3.1
|
2.5
|
2.36
|
2.3
|
0.51
|
2.5
|
2.36
|
0.1
|
2
|
2.045
|
2.060
|
2.020
|
1.1
|
0.25
|
4.18
|
0.85
|
4～25
|
5.75
|
8
|
|
M3
|
0.5
|
18
|
5.5
|
5.68
|
5.32
|
3.6
|
3
|
2.86
|
2.87
|
0.51
|
3
|
2.86
|
0.1
|
2.5
|
2.65
|
2.58
|
2.52
|
1.3
|
0.3
|
5.07
|
1.15
|
5～30
|
4.5～9.5
|
7～12
|
|
M4
|
0.7
|
20
|
7
|
7.22
|
6.78
|
4.7
|
4
|
3.82
|
3.44
|
0.6
|
4
|
3.82
|
0.2
|
3
|
3.071
|
3.080
|
3.020
|
2
|
0.4
|
6.53
|
1.4
|
6～40
|
6.5～16.5
|
10～20
|
|
M5
|
0.8
|
22
|
8.5
|
8.72
|
8.28
|
5.7
|
5
|
4.82
|
4.58
|
0.6
|
5
|
4.82
|
0.2
|
4
|
4.084
|
4.095
|
4.020
|
2.5
|
0.5
|
8.03
|
1.9
|
8～50
|
4～24
|
8～28
|
|
M6
|
1
|
24
|
10
|
10.22
|
9.78
|
6.8
|
6
|
5.82
|
5.72
|
0.68
|
6
|
5.7
|
0.25
|
5
|
5.084
|
5.140
|
5.020
|
3
|
0.6
|
9.38
|
2.3
|
10～60
|
6～31
|
11～36
|
|
M8
|
1.25
|
28
|
13
|
13.27
|
12.73
|
9.2
|
8
|
7.78
|
6.86
|
1.02
|
8
|
7.64
|
0.4
|
6
|
6.095
|
6.140
|
6.020
|
4
|
0.8
|
12.33
|
3.3
|
12～80
|
5.75～45.75
|
12～52
|
|
M10
|
1.5
|
32
|
16
|
16.27
|
15.73
|
11.2
|
10
|
9.78
|
9.15
|
1.02
|
10
|
9.64
|
0.4
|
8
|
8.115
|
8.175
|
8.025
|
5
|
1
|
15.33
|
4
|
16～100
|
5.5～60.5
|
13～68
|
|
M12
|
1.75
|
36
|
18
|
18.27
|
17.73
|
13.7
|
12
|
11.73
|
11.43
|
1.45
|
12
|
11.57
|
0.6
|
10
|
10.115
|
10.175
|
10.025
|
6
|
1.2
|
17.23
|
4.8
|
20～120
|
10.25～75.25
|
19～84
|
|
(M14)9）
|
2
|
40
|
21
|
21.33
|
20.67
|
15.7
|
14
|
13.73
|
13.72
|
1.45
|
14
|
13.57
|
0.6
|
12
|
12.142
|
12.212
|
12.032
|
7
|
1.4
|
20.17
|
5.8
|
25～140
|
10～90
|
20～100
|
|
M16
|
2
|
44
|
24
|
24.33
|
23.67
|
17.7
|
16
|
15.73
|
16
|
1.45
|
16
|
15.57
|
0.6
|
14
|
14.142
|
14.212
|
14.032
|
8
|
1.6
|
23.17
|
6.8
|
25～160
|
11～106
|
21～116
|
|
M20
|
2.5
|
52
|
30
|
30.33
|
29.67
|
22.4
|
20
|
19.67
|
19.44
|
2.04
|
20
|
19.48
|
0.8
|
17
|
17.23
|
17.23
|
17.05
|
10
|
2
|
28.87
|
8.6
|
30～200
|
15.5～135.5
|
28～148
|
|
M24
|
3
|
60
|
36
|
36.39
|
35.61
|
26.4
|
24
|
23.67
|
21.73
|
2.04
|
24
|
23.48
|
0.8
|
19
|
19.275
|
19.275
|
19.065
|
12
|
2.4
|
34.81
|
10.4
|
40～200
|
15～125
|
30～140
|
|
M30
|
3.5
|
72
|
45
|
45.39
|
44.61
|
33.4
|
30
|
29.67
|
25.15
|
2.89
|
30
|
29.48
|
1
|
22
|
22.275
|
22.275
|
22.065
|
15.5
|
3
|
43.61
|
13.1
|
45～200
|
20.5～110.5
|
38～128
|
|
M36
|
4
|
84
|
54
|
54.46
|
53.54
|
39.4
|
36
|
35.61
|
30.85
|
2.89
|
36
|
35.38
|
1
|
27
|
27.275
|
27.275
|
27.065
|
19
|
3.6
|
52.54
|
15.3
|
55～200
|
16～96
|
36～116
|
|
M42
|
4.5
|
96
|
63
|
63.46
|
62.54
|
45.6
|
42
|
41.61
|
36.57
|
3.06
|
42
|
41.38
|
1.2
|
32
|
—
|
32.33
|
32.08
|
24
|
4.2
|
61.34
|
16.3
|
60～300
|
21.5～181.5
|
44～204
|
|
M48
|
5
|
106
|
72
|
72.46
|
71.54
|
52.6
|
48
|
47.61
|
41.13
|
3.91
|
48
|
47.38
|
1.6
|
36
|
—
|
36.33
|
36.08
|
28
|
4.8
|
70.34
|
17.5
|
70～300
|
27～167
|
52～192
|
|
M56
|
5.6
|
124
|
84
|
84.54
|
83.46
|
63
|
56
|
55.54
|
46.83
|
5.95
|
56
|
55.26
|
2
|
41
|
—
|
41.33
|
41.08
|
34
|
5.6
|
82.26
|
19
|
80～300
|
28.5～148.5
|
56～176
|
|
M64
|
6
|
140
|
96
|
96.54
|
95.46
|
71
|
64
|
63.54
|
52.53
|
5.95
|
64
|
63.26
|
2
|
46
|
—
|
46.33
|
46.08
|
38
|
6.4
|
94.26
|
22
|
90～300
|
30～130
|
60～160
|
注：1）P—螺距。
2）尽可能不采用括号内的规格。
l的范围：
|
公称
|
2.5
|
3
|
4
|
5
|
6
|
8
|
10
|
12
|
16
|
20
|
25
|
30
|
35
|
40
|
45
|
50
|
55
|
60
|
65
|
70
|
80
|
90
|
100
|
110
|
120
|
130
|
|
min
|
2.3
|
2.8
|
3.76
|
4.76
|
5.76
|
7.71
|
9.71
|
11.65
|
15.65
|
19.58
|
24.58
|
29.58
|
34.5
|
39.5
|
44.5
|
49.5
|
54.4
|
59.4
|
64.4
|
69.4
|
79.4
|
89.3
|
99.3
|
109.3
|
119.3
|
129.3
|
|
max
|
2.7
|
3.2
|
4.24
|
5.24
|
6.24
|
8.29
|
10.29
|
12.35
|
16.35
|
20.42
|
25.42
|
30.42
|
35.5
|
40.5
|
45.5
|
50.5
|
55.6
|
60.6
|
65.6
|
70.6
|
80.6
|
90.7
|
100.7
|
110.7
|
120.7
|
130.8
|
|
公称
|
140
|
150
|
160
|
180
|
200
|
220
|
240
|
260
|
280
|
300
|
|
min
|
139.2
|
149.2
|
159.2
|
179.2
|
199.075
|
219.075
|
239.075
|
258.95
|
278.95
|
298.95
|
|
max
|
140.8
|
150.8
|
160.8
|
180.8
|
200.925
|
220.925
|
240.925
|
261.05
|
281.05
|
301.05
|
