|
英制锯齿形螺纹的紧密级(close class)公差 0.001 in |
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|
公称直径范围 /in |
优 选 直 径 /in |
牙 数 |
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|
20 |
16 |
12 |
10 |
8 |
6 |
5 |
4 |
3 |
21/2 |
2 |
11/2 |
11/4 |
1 |
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|
＞ |
≤ |
中径和顶径公差 |
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|
11) |
11/2 |
1，11/8，11/4，13/8，11/2 |
4.0 |
4.3 |
4.8 |
5.1 |
5.5 |
6.1 |
— |
— |
— |
— |
— |
— |
— |
— |
|
11/2 |
21/2 |
13/4，2，21/4，21/2 |
4.3 |
4.6 |
5.0 |
5.3 |
5.8 |
6.4 |
6.8 |
— |
— |
— |
— |
— |
— |
— |
|
21/2 |
4 |
23/4，3，31/2，4 |
4.6 |
4.9 |
5.3 |
5.6 |
6.1 |
6.7 |
7.1 |
7.7 |
— |
— |
— |
— |
— |
— |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
4 |
6 |
41/2，5，51/2，6 |
4.9 |
5.2 |
5.6 |
5.9 |
6.4 |
7.0 |
7.4 |
8.0 |
8.9 |
— |
— |
— |
— |
— |
|
6 |
10 |
7，8，9，10 |
5.2 |
5.6 |
6.0 |
6.3 |
6.7 |
7.4 |
7.8 |
8.4 |
9.3 |
10.0 |
1.8 |
— |
— |
— |
|
10 |
16 |
11，12，14，16 |
— |
6.0 |
6.5 |
6.8 |
7.2 |
7.8 |
8.3 |
8.9 |
9.8 |
10.4 |
11.3 |
12.6 |
13.5 |
— |
|
|
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|
|
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|
|
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|
|
|
|
|
|
|
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|
16 |
24 |
18，20，22，24 |
— |
— |
7.0 |
7.3 |
7.7 |
8.3 |
8.8 |
9.4 |
10.3 |
10.9 |
11.8 |
13.0 |
13.9 |
15.2 |
|
注：当旋合长度为10P 时，紧密级中径公差等于2/3 1)包含公称直径1。 |
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