圆柱头用沉孔尺寸：摘自GB/T 152.3-1988
|
螺纹规格d
|
d2
|
t
|
d3
|
d1
|
|
1.6
|
3.3
|
1.8
|
-
|
1.8
|
|
2
|
4.3
|
2.3
|
-
|
2.4
|
|
2.5
|
5
|
2.9
|
-
|
2.9
|
|
3
|
6
|
3.4
|
-
|
3.4
|
|
4
|
9
|
4.6
|
-
|
4.5
|
|
5
|
10
|
5.7
|
-
|
5.5
|
|
6
|
11
|
6.8
|
-
|
6.6
|
|
8
|
15
|
9
|
-
|
9
|
|
10
|
18
|
11
|
-
|
11
|
|
12
|
20
|
13
|
16
|
13.5
|
|
14
|
24
|
15
|
18
|
15.5
|
|
16
|
26
|
17.5
|
20
|
17.5
|
|
20
|
33
|
21.5
|
24
|
22
|
|
24
|
40
|
25.5
|
28
|
26
|
|
30
|
48
|
32
|
36
|
33
|
|
36
|
57
|
38
|
42
|
39
|
