滚花小头螺钉 (摘自GB 836-88)
螺纹规格为M1.6~M6的滚花小头螺钉。
标记示例:
螺纹规格d=M5、公称长度l=20mm、性能等级为4.8级、不经表面处理的滚花小头螺钉的标记:
螺钉 GB 836 M5×20
螺纹规格为M1.6~M6的滚花小头螺钉:
螺纹规格
d
|
dk
(滚花前)
|
K
|
R≈
|
r
min
|
re≈
|
l
|
max
|
min
|
max
|
min
|
M1.6
|
3.5
|
3.32
|
10
|
9.78
|
4
|
0.1
|
2.24
|
3~16
|
M2
|
4
|
3.82
|
11
|
10.73
|
4
|
0.1
|
2.8
|
4~20
|
M2.5
|
5
|
4.82
|
11
|
10.73
|
5
|
0.1
|
3.5
|
5~20
|
M3
|
6
|
5.82
|
12
|
11.73
|
6
|
0.1
|
4.2
|
6~25
|
M4
|
7
|
6.78
|
12
|
11.73
|
8
|
0.2
|
5.6
|
8~30
|
M5
|
8
|
7.78
|
13
|
12.73
|
8
|
0.2
|
7
|
10~35
|
M6
|
10
|
9.78
|
13
|
12.73
|
10
|
0.25
|
8.4
|
12~40
|
l的范围:
公称
|
3
|
4
|
5
|
6
|
8
|
10
|
12
|
(14)
|
16
|
20
|
25
|
30
|
35
|
40
|
min
|
2.80
|
3.76
|
4.76
|
5.76
|
7.71
|
9.71
|
11.65
|
13.65
|
15.65
|
19.58
|
24.58
|
29.58
|
34.50
|
39.50
|
max
|
3.20
|
4.24
|
5.24
|
6.24
|
8.29
|
10.29
|
12.35
|
14.35
|
16.35
|
20.42
|
25.42
|
30.42
|
35.50
|
44.50
|