55°密封管螺纹
圆锥外螺纹和圆柱内螺纹的基本尺寸及其公差(摘自GB/T 7306.1-2000)
|
尺寸代号
|
每25.4mm内所包含的牙数n
|
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≥
|
圆柱内螺纹直径的极限偏差±
|
|
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
|
径向
|
轴向圈数T2/2
|
|
基本
|
最大
|
最小
|
|
mm
|
mm
|
mm
|
mm
|
mm
|
mm
|
mm
|
圈数
|
mm
|
mm
|
mm
|
圈数
|
mm
|
mm
|
mm
|
mm
|
|
1/16
|
28
|
0.907
|
0.581
|
7.723
|
7.142
|
6.561
|
4
|
0.9
|
1
|
4.9
|
3.1
|
2.5
|
2 3/4
|
6.5
|
7.4
|
5.6
|
0.071
|
1 1/4
|
|
1/8
|
28
|
0.907
|
0.581
|
9.728
|
9.147
|
8.566
|
4
|
0.9
|
1
|
4.9
|
3.1
|
2.5
|
2 3/4
|
6.5
|
7.4
|
5.6
|
0.071
|
1 1/4
|
|
1/4
|
19
|
1.337
|
0.856
|
13.157
|
12.301
|
11.445
|
6
|
1.3
|
1
|
7.3
|
4.7
|
3.7
|
2
3/4
|
9.7
|
11
|
8.4
|
0.104
|
1
1/4
|
|
3/8
|
19
|
1.337
|
0.856
|
16.662
|
15.806
|
14.95
|
6.4
|
1.3
|
1
|
7.7
|
5.1
|
3.7
|
2
3/4
|
10.1
|
11.4
|
8.8
|
0.104
|
1
1/4
|
|
1/2
|
14
|
1.814
|
1.162
|
20.955
|
19.793
|
18.631
|
8.2
|
1.8
|
1
|
10
|
6.4
|
5
|
2
3/4
|
13.2
|
15
|
11.4
|
0.104
|
1
1/4
|
|
3/4
|
14
|
1.814
|
1.162
|
26.441
|
25.279
|
24.117
|
9.5
|
1.8
|
1
|
11.3
|
7.7
|
5
|
2
3/4
|
14.5
|
16.3
|
12.7
|
0.142
|
1
1/4
|
|
1
|
11
|
2.309
|
1.479
|
33.249
|
31.77
|
30.291
|
10.4
|
2.3
|
1
|
12.7
|
8.1
|
6.4
|
2
3/4
|
16.8
|
19.1
|
14.5
|
0.142
|
1
1/4
|
|
1 1/4
|
11
|
2.309
|
1.479
|
41.91
|
40.431
|
38.952
|
12.7
|
2.3
|
1
|
15
|
10.4
|
6.4
|
2
3/4
|
19.1
|
21.4
|
16.8
|
0.18
|
1
1/4
|
|
1 1/2
|
11
|
2.309
|
1.479
|
47.803
|
46.324
|
44.845
|
12.7
|
2.3
|
1
|
15
|
10.4
|
6.4
|
2
3/4
|
19.1
|
21.4
|
16.8
|
0.18
|
1
1/4
|
|
2
|
11
|
2.309
|
1.479
|
59.614
|
58.135
|
56.656
|
15.9
|
2.3
|
1
|
18.2
|
13.6
|
7.5
|
3 1/4
|
23.4
|
25.7
|
21.1
|
0.18
|
1
1/4
|
|
2 1/2
|
11
|
2.309
|
1.479
|
75.184
|
73.705
|
72.226
|
17.5
|
3.5
|
1 1/2
|
21
|
14
|
9.2
|
4
|
26.7
|
30.2
|
23.2
|
0.18
|
1
1/4
|
|
3
|
11
|
2.309
|
1.479
|
87.884
|
86.405
|
84.926
|
20.6
|
3.5
|
1 1/2
|
24.1
|
17.1
|
9.2
|
4
|
29.8
|
33.3
|
26.3
|
0.216
|
1 1/2
|
|
4
|
11
|
2.309
|
1.479
|
113.03
|
111.551
|
110.072
|
25.4
|
3.5
|
1
1/2
|
28.9
|
21.9
|
10.4
|
4 1/2
|
35.8
|
39.3
|
32.3
|
0.216
|
1 1/2
|
|
5
|
11
|
2.309
|
1.479
|
138.43
|
136.951
|
135.472
|
28.6
|
3.5
|
1
1/2
|
32.1
|
25.1
|
11.5
|
5
|
40.1
|
43.6
|
36.6
|
0.216
|
1
1/2
|
|
6
|
11
|
2.309
|
1.479
|
163.83
|
162.351
|
160.872
|
28.6
|
3.5
|
1
1/2
|
32.1
|
25.1
|
11.5
|
5
|
40.1
|
43.6
|
36.6
|
0.216
|
1
1/2
|
圆锥内螺纹和圆锥外螺纹的基本尺寸及其公差(摘自GB/T 7306.2-2000)
|
尺寸代号
|
每25.4mm内所包含的牙数n
|
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≥
|
圆锥内螺纹基准平面轴向位置的极限偏差±T2/2
|
|
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
|
|
基本
|
最大
|
最小
|
|
mm
|
mm
|
mm
|
mm
|
mm
|
mm
|
mm
|
圈数
|
mm
|
mm
|
mm
|
圈数
|
mm
|
mm
|
mm
|
mm
|
圈数
|
|
1/16
|
28
|
0.907
|
0.581
|
7.723
|
7.142
|
6.561
|
4
|
0.9
|
1
|
4.9
|
3.1
|
2.5
|
2 3/4
|
6.5
|
7.4
|
5.6
|
1.1
|
1 1/4
|
|
1/8
|
28
|
0.907
|
0.581
|
9.728
|
9.147
|
8.566
|
4
|
0.9
|
1
|
4.9
|
3.1
|
2.5
|
2
3/4
|
6.5
|
7.4
|
5.6
|
1.1
|
1
1/4
|
|
1/4
|
19
|
1.337
|
0.856
|
13.157
|
12.301
|
11.445
|
6
|
1.3
|
1
|
7.3
|
4.7
|
3.7
|
2 3/4
|
9.7
|
11
|
8.4
|
1.7
|
1 1/4
|
|
3/8
|
19
|
1.337
|
0.856
|
16.662
|
15.806
|
14.95
|
6.4
|
1.3
|
1
|
7.7
|
5.1
|
3.7
|
2 3/4
|
10.1
|
11.4
|
8.8
|
1.7
|
1 1/4
|
|
1/2
|
14
|
1.814
|
1.162
|
20.955
|
19.793
|
18.631
|
8.2
|
1.8
|
1
|
10
|
6.4
|
5
|
2 3/4
|
13.2
|
15
|
11.4
|
2.3
|
1 1/4
|
|
3/4
|
14
|
1.814
|
1.162
|
26.441
|
25.279
|
24.117
|
9.5
|
1.8
|
1
|
11.3
|
7.7
|
5
|
2 3/4
|
14.5
|
16.3
|
12.7
|
2.3
|
1 1/4
|
|
1
|
11
|
2.309
|
1.479
|
33.249
|
31.77
|
30.291
|
10.4
|
2.3
|
1
|
12.7
|
8.1
|
6.4
|
2 3/4
|
16.8
|
19.1
|
14.5
|
2.9
|
1 1/4
|
|
1 1/4
|
11
|
2.309
|
1.479
|
41.91
|
40.431
|
38.952
|
12.7
|
2.3
|
1
|
15
|
10.4
|
6.4
|
2 3/4
|
19.1
|
21.4
|
16.8
|
2.9
|
1 1/4
|
|
1 1/2
|
11
|
2.309
|
1.479
|
47.803
|
46.324
|
44.845
|
12.7
|
2.3
|
1
|
15
|
10.4
|
6.4
|
2 3/4
|
19.1
|
21.4
|
16.8
|
2.9
|
1 1/4
|
|
2
|
11
|
2.309
|
1.479
|
59.614
|
58.135
|
56.656
|
15.9
|
2.3
|
1
|
18.2
|
13.6
|
7.5
|
3
1/4
|
23.4
|
25.7
|
21.1
|
2.9
|
1 1/4
|
|
2 1/2
|
11
|
2.309
|
1.479
|
75.184
|
73.705
|
72.226
|
17.5
|
3.5
|
1
1/2
|
21
|
14
|
9.2
|
4
|
26.7
|
30.2
|
23.2
|
3.5
|
1
1/2
|
|
3
|
11
|
2.309
|
1.479
|
87.884
|
86.405
|
84.926
|
20.6
|
3.5
|
1
1/2
|
24.1
|
17.1
|
9.2
|
4
|
29.8
|
33.3
|
26.3
|
3.5
|
1
1/2
|
|
4
|
11
|
2.309
|
1.479
|
113.03
|
111.551
|
110.072
|
25.4
|
3.5
|
1 1/2
|
28.9
|
21.9
|
10.4
|
4
1/2
|
35.8
|
39.3
|
32.3
|
3.5
|
1 1/2
|
|
5
|
11
|
2.309
|
1.479
|
138.43
|
136.951
|
135.472
|
28.6
|
3.5
|
1 1/2
|
32.1
|
25.1
|
11.5
|
5
|
40.1
|
43.6
|
36.6
|
3.5
|
1 1/2
|
|
6
|
11
|
2.309
|
1.479
|
163.83
|
162.351
|
160.872
|
28.6
|
3.5
|
1 1/2
|
32.1
|
25.1
|
11.5
|
5
|
40.1
|
43.6
|
36.6
|
3.5
|
1 1/2
|
