开槽球面大圆柱头螺钉 (摘自GB 947-88)
螺纹规格为M1.6～10的开槽球面圆柱头螺钉。
标记示例：
螺纹规格d=M5、公称长度l=20mm、性能等级为4.8级、不经表面处理的开槽球面圆柱头螺钉的标记：
螺钉 GB 947 M5×20
螺纹规格为M1.6～10的球面圆柱头螺钉:
螺纹规格
d
|
a
max
|
dk
|
da
max
|
K
|
n
|
r
min
|
t
min
|
W
min
|
R≈
|
re ≈
|
l
|
max
|
min
|
max
|
min
|
公称
|
min
|
max
|
M1.6
|
0.7
|
6
|
5.82
|
2.1
|
1.2
|
1.06
|
0.4
|
0.46
|
0.6
|
0.1
|
0.6
|
0.26
|
10
|
2.24
|
2～5
|
M2
|
0.8
|
7
|
6.78
|
2.6
|
1.4
|
1.26
|
0.5
|
0.56
|
0.7
|
0.1
|
0.7
|
0.36
|
12
|
2.8
|
2.5～6
|
M2.5
|
0.9
|
9
|
8.78
|
3.1
|
1.8
|
1.66
|
0.6
|
0.66
|
0.8
|
0.1
|
0.9
|
0.56
|
14
|
3.5
|
3～8
|
M3
|
1
|
11
|
10.73
|
3.6
|
2
|
1.86
|
0.8
|
0.86
|
1
|
0.1
|
1
|
0.66
|
16
|
4.2
|
4～10
|
M4
|
1.4
|
14
|
13.73
|
4.7
|
2.8
|
2.66
|
1.2
|
1.26
|
1.51
|
0.2
|
1.4
|
1.06
|
20
|
5.6
|
5～12
|
M5
|
1.6
|
17
|
16.73
|
5.7
|
3.5
|
3.32
|
1.2
|
1.26
|
1.51
|
0.2
|
1.7
|
1.22
|
25
|
7
|
6～14
|
M6
|
2
|
20
|
19.67
|
6.8
|
4
|
3.7
|
1.6
|
1.66
|
1.91
|
0.25
|
2
|
1.3
|
30
|
8.4
|
8～16
|
M8
|
2.5
|
25
|
24.67
|
9.2
|
5
|
4.7
|
2
|
2.66
|
2.31
|
0.4
|
2.5
|
1.5
|
36
|
11.2
|
10～20
|
M10
|
3
|
30
|
29.67
|
11.2
|
6
|
5.7
|
2.5
|
2.56
|
2.81
|
0.4
|
3
|
1.8
|
40
|
14
|
12～20
|
l的范围：
公称
|
2
|
2.5
|
3
|
4
|
5
|
6
|
8
|
10
|
12
|
(14)
|
16
|
20
|
min
|
1.80
|
2.30
|
2.80
|
3.76
|
4.76
|
5.76
|
7.71
|
9.71
|
11.65
|
13.65
|
15.65
|
19.58
|
max
|
2.20
|
2.70
|
3.20
|
4.24
|
5.24
|
6.24
|
8.29
|
10.29
|
12.35
|
14.35
|
16.35
|
20.42
|
