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英制密封管螺纹的基本尺寸及其公差 |
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螺纹 尺寸 代号 |
牙数 n
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螺距 P |
牙高 h |
基准平面内的 基本直径 |
基准距离 |
装配 余量 |
外螺纹的有效 螺纹不小于 |
内螺纹直径 的极限偏差 ±T2/2 |
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大径 (基准 直径) d＝D |
中径 d2＝D2 |
小径 d1＝D1 |
基本 |
极限偏差 ±T1/2 |
最大 |
最小 |
基准距离分别为 |
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基本 |
最大 |
最小 |
径向 |
轴向 |
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mm |
mm |
mm |
mm |
mm |
mm |
mm |
圈数 |
mm |
mm |
mm |
圈数 |
mm |
mm |
mm |
mm |
圈数 |
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1/16 |
28 |
0.907 |
0.581 |
7.723 |
7.142 |
6.561 |
4 |
0.9 |
1 |
4.9 |
3.1 |
2.5 |
23/4 |
6.5 |
7.4 |
5.6 |
0.071 |
11/4 |
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1/8 |
28 |
0.907 |
0.581 |
9.728 |
9.147 |
8.566 |
4 |
0.9 |
1 |
4.9 |
3.1 |
2.5 |
23/4 |
6.5 |
7.4 |
5.6 |
0.071 |
11/4 |
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1/4 |
19 |
1.337 |
0.856 |
13.157 |
12.301 |
11.445 |
6 |
1.3 |
1 |
7.3 |
4.7 |
3.7 |
23/4 |
9.7 |
11 |
8.4 |
0.104 |
11/4 |
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3/8 |
19 |
1.337 |
0.856 |
16.662 |
15.806 |
14.950 |
6.4 |
1.3 |
1 |
7.7 |
5.1 |
3.7 |
23/4 |
10.1 |
11.4 |
8.8 |
0.104 |
11/4 |
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1/2 |
14 |
1.814 |
1.162 |
20.955 |
19.793 |
18.631 |
8.2 |
1.8 |
1 |
10.0 |
6.4 |
5.0 |
23/4 |
13.2 |
15 |
11.4 |
0.142 |
11/4 |
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3/4 |
14 |
1.814 |
1.162 |
26.441 |
25.279 |
24.117 |
9.5 |
1.8 |
1 |
11.3 |
7.7 |
5.0 |
23/4 |
14.5 |
16.3 |
12.7 |
0.142 |
11/4 |
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1 |
11 |
2.309 |
1.479 |
33.249 |
31.770 |
30.291 |
10.4 |
2.3 |
1 |
12.7 |
8.1 |
6.4 |
23/4 |
16.8 |
19.1 |
14.5 |
0.180 |
11/4 |
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11/4 |
11 |
2.309 |
1.479 |
41.910 |
40.431 |
38.952 |
12.7 |
2.3 |
1 |
15.0 |
10.4 |
6.4 |
23/4 |
19.1 |
21.4 |
16.8 |
0.180 |
11/4 |
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11/2 |
11 |
2.309 |
1.479 |
47.803 |
46.324 |
44.845 |
12.7 |
2.3 |
1 |
15.0 |
10.4 |
6.4 |
23/4 |
19.1 |
21.4 |
16.8 |
0.180 |
11/4 |
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2 |
11 |
2.309 |
1.479 |
59.614 |
58.135 |
56.656 |
15.9 |
2.3 |
1 |
18.2 |
13.6 |
7.5 |
31/4 |
23.4 |
25.7 |
21.0 |
0.180 |
11/4 |
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21/2 |
11 |
2.309 |
1.479 |
75.184 |
73.705 |
72.226 |
17.5 |
3.5 |
11/2 |
21.0 |
14.0 |
9.2 |
4 |
26.7 |
30.2 |
23.2 |
0.216 |
11/2 |
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3 |
11 |
2.309 |
1.479 |
87.884 |
86.405 |
84.926 |
20.6 |
3.5 |
11/2 |
24.1 |
17.1 |
9.2 |
4 |
29.8 |
33.3 |
26.3 |
0.216 |
11/2 |
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4 |
11 |
2.309 |
1.479 |
113.030 |
111.551 |
110.072 |
25.4 |
3.5 |
11/2 |
28.9 |
21.9 |
10.4 |
41/2 |
35.8 |
39.3 |
32.3 |
0.216 |
11/2 |
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5 |
11 |
2.309 |
1.479 |
138.430 |
136.951 |
135.472 |
28.6 |
3.5 |
11/2 |
32.1 |
25.1 |
11.5 |
5 |
40.1 |
43.6 |
36.6 |
0.216 |
11/2 |
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6 |
11 |
2.309 |
1.479 |
163.830 |
162.351 |
160.872 |
28.6 |
3.5 |
11/2 |
32.1 |
25.1 |
11.5 |
5 |
40.1 |
43.6 |
36.6 |
0.216 |
11/2 |
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注：1．英制密封圆锥外螺纹基准平面轴向位置的极限偏差见本表的第9、10栏； 2．英制密封圆柱内螺纹各直径的极限偏差见本表的第18栏；英制密封圆锥内螺纹基准平面轴向位置的极限偏差见本表的第19栏 其中：D2＝d2＝D － 0.640 327P； D1＝d1＝D － 1.280 654P。 |