外螺纹的收尾、肩距和退刀槽(GB/T3-1997) (mm)
|
|
螺距P
|
收 尾ｘ max
|
肩 距a max
|
退刀槽
|
一般
|
短的
|
一般
|
长的
|
短的
|
g1min
|
g2max
|
dg
|
r≈
|
0.25
|
0.6
|
0.3
|
0.75
|
1
|
0.5
|
0.4
|
0.75
|
d-0.4
|
0.12
|
0.3
|
0.75
|
0.4
|
0.9
|
1.2
|
0.6
|
0.5
|
0.9
|
d—0.5
|
0.16
|
0.35
|
0.9
|
0.45
|
1.05
|
1.4
|
0.7
|
0.6
|
1.05
|
d—0.6
|
0.16
|
0.4
|
1
|
0.5
|
1.2
|
1.6
|
0.8
|
0.6
|
1.2
|
d—0.7
|
0.2
|
0.45
|
1.1
|
0.6
|
1.35
|
1.8
|
0.9
|
0.7
|
1.35
|
d—0.7
|
0.2
|
0.5
|
1.25
|
0.7
|
1.5
|
2
|
1
|
0.8
|
1.5
|
d—0.8
|
0.2
|
0.6
|
1.5
|
0.75
|
1.8
|
2.4
|
1.2
|
0.9
|
1.8
|
d—1
|
0.4
|
0.7
|
1.75
|
0.9
|
2.1
|
2.8
|
1.4
|
1.1
|
2.1
|
d—1.1
|
0.4
|
0.75
|
1.9
|
1
|
2.25
|
3
|
1.5
|
1.2
|
2.25
|
d—1.2
|
0.4
|
0.8
|
2
|
1
|
2.4
|
3.2
|
1.6
|
1.3
|
2.4
|
d—1.3
|
0.4
|
1
|
2.5
|
1.25
|
3
|
4
|
2
|
1.6
|
3
|
d—1.6
|
0.6
|
1.25
|
3.2
|
1.6
|
4
|
5
|
2.5
|
2
|
3.75
|
d—2
|
0.6
|
1.5
|
3.8
|
1.9
|
4.5
|
6
|
3
|
2.5
|
4.5
|
d—2.3
|
0.8
|
1.75
|
4.3
|
2.2
|
5.3
|
7
|
3.5
|
3
|
5.25
|
d—2.6
|
1
|
2
|
5
|
2.5
|
6
|
8
|
4
|
3.4
|
6
|
d—3
|
1
|
2.5
|
6.3
|
3.2
|
7.5
|
10
|
5
|
4.4
|
7.5
|
d—3.6
|
1.2
|
3
|
7.5
|
3.8
|
9
|
12
|
6
|
5.2
|
9
|
d—4.4
|
1.6
|
3.5
|
9
|
4.5
|
10.5
|
14
|
7
|
6.2
|
10.5
|
d—5
|
1.6
|
4
|
10
|
5
|
12
|
16
|
8
|
7
|
12
|
d—5.7
|
2
|
4.5
|
11
|
5.5
|
13.5
|
18
|
9
|
8
|
13.5
|
d—6.4
|
2.5
|
5
|
12.5
|
6.3
|
15
|
20
|
10
|
9
|
15
|
d—7
|
2.5
|
5.5
|
14
|
7
|
16.5
|
22
|
11
|
11
|
17.5
|
d—7.7
|
3.2
|
6
|
15
|
7.5
|
18
|
24
|
12
|
11
|
18
|
d—8.3
|
3.2
|
参考值
|
≈2.5P
|
≈1.25P
|
≈3P
|
＝4P
|
＝2P
|
—
|
≈3P
|
—
|
—
|
注: 1.应优先选用“一般”长度的收尾和肩距;“短”收尾和“短”肩距仅用于结构受限制的螺纹件上;产品等级为B或C级的螺纹紧固件可采用“长”肩距。
2. d为螺纹公称直径代号。
3. dg公差为:h13(d>3mm);h12(d≤mm)。
