非螺纹密封的管螺纹的基本牙型和基本尺寸(GB/T7307-1987) (mm)
P＝25.4／n
H＝0.960 491P
h＝0.640 327P
r＝0.137 329P
H／6＝0.160 082P
d2＝D2＝d-0.640 327P
d1＝D1＝d-1.280 654P
|
尺寸代号
|
每25.4mm
内的牙数n
|
螺距P
|
牙高h
|
圆弧半径
r≈
|
基本直径
|
大径
d＝D
|
中径
d2＝D2
|
小径
d1＝D1
|
1／16
|
28
|
0.907
|
0.581
|
0.125
|
7.723
|
7.142
|
6.561
|
1／8
|
28
|
0.907
|
0.581
|
0.125
|
9.728
|
9.147
|
8.566
|
1／4
|
19
|
1.337
|
0.856
|
0.184
|
13.157
|
12.301
|
11.445
|
3／8
|
19
|
1.337
|
0.856
|
0.184
|
16.662
|
15.806
|
14.950
|
1／2
|
14
|
1.814
|
1.162
|
0.249
|
20.955
|
19.793
|
18.631
|
5／8
|
14
|
1.814
|
1.162
|
0.249
|
22.911
|
21.749
|
20.587
|
3／4
|
14
|
1.814
|
1.162
|
0.249
|
26.441
|
25.279
|
24.117
|
7／8
|
14
|
1.814
|
1.162
|
0.249
|
30.201
|
29.039
|
27.877
|
1
|
11
|
2.309
|
1.479
|
0.317
|
33.249
|
31.770
|
30.291
|
|
|
11
|
2.309
|
1.479
|
0.317
|
37.897
|
36.418
|
34.939
|
|
|
11
|
2.309
|
1.479
|
0.317
|
41.910
|
40.431
|
38.952
|
|
|
11
|
2.309
|
1.479
|
0.317
|
47.803
|
46.324
|
44.845
|
|
|
11
|
2.309
|
1.479
|
0.317
|
53.746
|
52.267
|
50.788
|
2
|
11
|
2.309
|
1.479
|
0.317
|
59.614
|
58.135
|
56.656
|
|
|
11
|
2.309
|
1.479
|
0.317
|
65.710
|
64.231
|
62.752
|
|
|
11
|
2.309
|
1.479
|
0.317
|
75.184
|
73.705
|
72.226
|
|
|
11
|
2.309
|
1.479
|
0.317
|
81.534
|
80.055
|
78.576
|
3
|
11
|
2.309
|
1.479
|
0.317
|
87.884
|
86.405
|
84.926
|
|
|
11
|
2.309
|
1.479
|
0.317
|
100.330
|
98.851
|
97.372
|
4
|
11
|
2.309
|
1.479
|
0.317
|
113.030
|
111.551
|
110.072
|
|
|
11
|
2.309
|
1.479
|
0.317
|
125.730
|
124.251
|
122.772
|
5
|
11
|
2.309
|
1.479
|
0.317
|
138.430
|
136.951
|
135.472
|
|
|
11
|
2.309
|
1.479
|
0.317
|
151.130
|
149.651
|
148.172
|
6
|
11
|
2.309
|
1.479
|
0.317
|
163.830
|
162.351
|
160.872
|
