非螺纹密封的管螺纹的基本尺寸和公差
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0
0
+0.125
0
+0.445
1/2
14
1.814
1.162
0.249
20.955
19.793
18.631
-0.284
0
-0.142
-0.250
0
0
+0.142
0
+0.541
5/8
14
1.814
1.162
0.249
22.911
21.749
20.587
-0.284
0
-0.142
-0.284
0
0
+0.142
0.317
53.746
52.267
50.788
-0.360
0
-0.180
-0.360
0
0
+0.180
0
+0.640
2
11
2.309
1.479
0.317
59.614
58.135
56.656
-0.360
0
-0.180
-0.360
0
0
+0.180
0
+0.640
21/4
11
2.309
1.479
0.317
65.710
0
-0.217
-0.434
0
0
+0.217
0wk.baidu.com
+0.640
5
11
2.309
1.479
0.317
138.430
136.951
135.472
-0.434
0
-0.127
-0.434
0
0
+0.217
0
+0.640
5/12
11
2.309
1.479
0.317
151.130
149.651
148.172
-0.434
0
78.576
-0.434
0
-0.217
-0.434
0
0
+0.217
0
+0.640
3
11
2.309
1.479
0.317
87.884
86.405
84.926
-0.434
0
-0.217
-0.434
0
0
+0.217
0
+0.640
31/2
11
2.309
1.479
0.317
100.330
98.851
97.372
1
11
2.309
1.479
0.317
33.249
31.770
30.291
-0.360
0
-0.180
-0.284
0
0
+0.180
0
+0.640
11/8
11
2.309
1.479
0.317
37.897
36.418
34.939
-0.360
0
-0.180
-0.360
0
0
+0.180
0
+0.640
11/4
11
2.309
-0.127
-0.434
0
0
+0.127
0
+0.640
6
11
2.309
1.479
0.317
163.830
162.351
160.872
-0.434
0
-0.217
-0.434
0
0
+0.217
0
+0.640
上偏差
mm
下偏差
mm
上偏差
mm
下偏差
mm
上偏差
mm
A级
mm
B级
mm
1/16
28
0.907
0.581
0.125
7.723
7.142
6.561
-0.214
0
-0.107
-0.214
0
0
+0.107
0
+0.282
1/8
28
0.907
0.581
0.125
9.728
9.147
8.566
-0.214
0
-0.107
-0.214
0
0
+0.107
0
+0.282
1/4
19
1.337
0.856
0.184
13.157
12.301
11.445
-0.250
0
-0.125
-0.214
0
0
+0.125
0
+0.445
3/8
19
1.337
0.856
0.184
16.662
15.806
14.950
-0.250
0
-0.125
-0.250
-0.434
0
-0.217
-0.434
0
0
+0.217
0
+0.640
4
11
2.309
1.479
0.317
113.030
111.551
110.072
-0.434
0
-0.217
-0.434
0
0
+0.217
0
+0.640
41/2
11
2.309
1.479
0.317
125.730
124.251
122.772
-0.434
0
+0.541
3/4
14
1.814
1.162
0.249
26.441
25.279
24.117
-0.284
0
-0.142
-0.284
0
0
+0.142
0
+0.541
7/8
14
1.814
1.162
0.317
30.201
29.039
27.877
-0.284
0
-0.142
-0.284
0
0
+0.142
0
+0.541
表一非螺纹密封的管螺纹的基本尺寸和公差
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
尺寸
代号
每25.4mm内的
牙数
n
螺距
P
mm
牙高
h
mm
圆弧
半径
r
mm
基本直径
外螺纹
内螺纹
大径
d=D
mm
中径
d2=D2
mm
小径
d1=D1
mm
大径公差Td
中径公差Td2
中径公差TD2
小径公差TD1
下偏差
mm
上偏差
mm
下公差
64.231
62.752
-0.434
0
-0.217
-0.360
0
0
+0.217
0
+0.640
21/2
11
2.309
1.479
0.317
75.184
73.705
72.226
-0.434
0
-0.217
-0.434
0
0
+0.217
0
+0.640
23/4
11
2.309
1.479
0.317
81.534
80.055
1.479
0.317
41.910
40.431
38.952
-0.360
0
-0.180
-0.360
0
0
+0.180
0
+0.640
11/2
11
2.309
1.479
0.317
47.803
46.324
44.845
-0.360
0
-0.180
-0.360
0
0
+0.180
0
+0.640
13/4
11
2.309
1.479
0
+0.125
0
+0.445
1/2
14
1.814
1.162
0.249
20.955
19.793
18.631
-0.284
0
-0.142
-0.250
0
0
+0.142
0
+0.541
5/8
14
1.814
1.162
0.249
22.911
21.749
20.587
-0.284
0
-0.142
-0.284
0
0
+0.142
0.317
53.746
52.267
50.788
-0.360
0
-0.180
-0.360
0
0
+0.180
0
+0.640
2
11
2.309
1.479
0.317
59.614
58.135
56.656
-0.360
0
-0.180
-0.360
0
0
+0.180
0
+0.640
21/4
11
2.309
1.479
0.317
65.710
0
-0.217
-0.434
0
0
+0.217
0wk.baidu.com
+0.640
5
11
2.309
1.479
0.317
138.430
136.951
135.472
-0.434
0
-0.127
-0.434
0
0
+0.217
0
+0.640
5/12
11
2.309
1.479
0.317
151.130
149.651
148.172
-0.434
0
78.576
-0.434
0
-0.217
-0.434
0
0
+0.217
0
+0.640
3
11
2.309
1.479
0.317
87.884
86.405
84.926
-0.434
0
-0.217
-0.434
0
0
+0.217
0
+0.640
31/2
11
2.309
1.479
0.317
100.330
98.851
97.372
1
11
2.309
1.479
0.317
33.249
31.770
30.291
-0.360
0
-0.180
-0.284
0
0
+0.180
0
+0.640
11/8
11
2.309
1.479
0.317
37.897
36.418
34.939
-0.360
0
-0.180
-0.360
0
0
+0.180
0
+0.640
11/4
11
2.309
-0.127
-0.434
0
0
+0.127
0
+0.640
6
11
2.309
1.479
0.317
163.830
162.351
160.872
-0.434
0
-0.217
-0.434
0
0
+0.217
0
+0.640
上偏差
mm
下偏差
mm
上偏差
mm
下偏差
mm
上偏差
mm
A级
mm
B级
mm
1/16
28
0.907
0.581
0.125
7.723
7.142
6.561
-0.214
0
-0.107
-0.214
0
0
+0.107
0
+0.282
1/8
28
0.907
0.581
0.125
9.728
9.147
8.566
-0.214
0
-0.107
-0.214
0
0
+0.107
0
+0.282
1/4
19
1.337
0.856
0.184
13.157
12.301
11.445
-0.250
0
-0.125
-0.214
0
0
+0.125
0
+0.445
3/8
19
1.337
0.856
0.184
16.662
15.806
14.950
-0.250
0
-0.125
-0.250
-0.434
0
-0.217
-0.434
0
0
+0.217
0
+0.640
4
11
2.309
1.479
0.317
113.030
111.551
110.072
-0.434
0
-0.217
-0.434
0
0
+0.217
0
+0.640
41/2
11
2.309
1.479
0.317
125.730
124.251
122.772
-0.434
0
+0.541
3/4
14
1.814
1.162
0.249
26.441
25.279
24.117
-0.284
0
-0.142
-0.284
0
0
+0.142
0
+0.541
7/8
14
1.814
1.162
0.317
30.201
29.039
27.877
-0.284
0
-0.142
-0.284
0
0
+0.142
0
+0.541
表一非螺纹密封的管螺纹的基本尺寸和公差
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
尺寸
代号
每25.4mm内的
牙数
n
螺距
P
mm
牙高
h
mm
圆弧
半径
r
mm
基本直径
外螺纹
内螺纹
大径
d=D
mm
中径
d2=D2
mm
小径
d1=D1
mm
大径公差Td
中径公差Td2
中径公差TD2
小径公差TD1
下偏差
mm
上偏差
mm
下公差
64.231
62.752
-0.434
0
-0.217
-0.360
0
0
+0.217
0
+0.640
21/2
11
2.309
1.479
0.317
75.184
73.705
72.226
-0.434
0
-0.217
-0.434
0
0
+0.217
0
+0.640
23/4
11
2.309
1.479
0.317
81.534
80.055
1.479
0.317
41.910
40.431
38.952
-0.360
0
-0.180
-0.360
0
0
+0.180
0
+0.640
11/2
11
2.309
1.479
0.317
47.803
46.324
44.845
-0.360
0
-0.180
-0.360
0
0
+0.180
0
+0.640
13/4
11
2.309
1.479