螺紋代號 |
基本尺寸 英寸 |
大徑mm |
螺距mm p |
每英寸牙數(shù) |
中徑mm |
小徑 |
牙型高度 |
圓弧尺寸 |
底孔尺寸 |
R 1/16 |
1/16" |
7.723 |
0.907 |
28 |
7.142 |
6.561 |
0.581 |
0.125 |
6.4 |
R 1/8 |
1/8" |
9.728 |
0.907 |
28 |
9.147 |
8.566 |
0.581 |
0.125 |
8.4 |
R 1/4 |
1/4" |
13.157 |
1.337 |
19 |
12.301 |
11.445 |
0.856 |
0.184 |
11.2 |
R 3/8 |
3/8" |
16.662 |
1.337 |
19 |
15.806 |
14.950 |
0.856 |
0.184 |
14.75 |
R 1/2 |
1/2" |
20.955 |
1.814 |
14 |
19.793 |
18.631 |
1.162 |
0.249 |
18.25 |
R 3/4 |
3/4" |
26.441 |
1.814 |
14 |
25.279 |
24.117 |
1.162 |
0.249 |
23.75 |
R 1 |
1" |
33.249 |
2.309 |
11 |
31.77 |
30.291 |
1.479 |
0.317 |
30 |
R 1 1/4 |
1 1/4" |
41.910 |
2.309 |
11 |
40.431 |
38.952 |
1.479 |
0.317 |
38.5 |
R 1 1/2 |
1 1/2" |
47.803 |
2.309 |
11 |
46.324 |
44.845 |
1.479 |
0.317 |
44.5 |
R 2 |
2" |
59.614 |
2.309 |
11 |
58.135 |
56.656 |
1.479 |
0.317 |
56 |
R 2 1/2 |
2 1/2" |
75.184 |
2.309 |
11 |
73.705 |
72.226 |
1.479 |
0.317 |
71 |
R 3 |
3" |
87.884 |
2.309 |
11 |
86.405 |
84.926 |
1.479 |
0.317 |
85.5 |
R 4 |
4" |
113.030 |
2.309 |
11 |
111.551 |
110.072 |
1.479 |
0.317 |
110.5 |
R 5 |
5" |
138.430 |
2.309 |
11 |
136.951 |
135.472 |
1.479 |
0.317 |
136 |
R 6 |
6" |
163.830 |
2.309 |
11 |
162.351 |
160.872 |
1.479 |
0.317 |
161.5 |
美制粗螺紋 |
美制細螺紋 |
|||||||
規(guī)格 （UNC) |
標準徑 |
2級牙鉆孔徑 |
規(guī)格 （UNF) |
標準徑 |
2級牙鉆孔徑 |
|||
最大 |
最小 |
最大 |
最小 |
|||||
NO.1-64(1.854) |
1.55 |
1.582 |
1.425 |
NO.0-80(1.524) |
1.25 |
1.305 |
1.182 |
|
