 |
NPT尺寸
NPT尺寸 |
每英寸螺纹数 |
尺寸“A”（英寸） |
尺寸“B”（英寸） |
| 1⁄16 |
27 |
0.312 |
0.261 |
| 1⁄8 |
27 |
0.405 |
0.264 |
| 1⁄4 |
18 |
0.540 |
0.402 |
| 3⁄8 |
18 |
0.675 |
0.408 |
| 1/2 |
14 |
0.840 |
0.534 |
| 3/4 |
14 |
1.050 |
0.546 |
| 1 |
111/2 |
1.315 |
0.683 |
| 1 1/4 |
111/2 |
1.660 |
0.707 |
直螺纹尺寸
标称螺纹尺寸 |
每英寸螺纹数 |
大口径 |
W |
H |
L |
| 粗(UNC) |
细(UNF) |
 |
| 0 |
- |
80 |
0.0600 |
| 1 |
64 |
72 |
0..0730 |
| 2 |
56 |
64 |
0.0860 |
| 3 |
48 |
56 |
0.0990 |
| 4 |
40 |
48 |
0.1120 |
| 5 |
40 |
44 |
0.1250 |
| 6 |
32 |
40 |
0.1380 |
| 8 |
32 |
36 |
0.1640 |
| 10 |
24 |
32 |
0.1900 |
| 12 |
24 |
28 |
0.2160 |
| 1/4 |
20 |
28 |
0.2500 |
7/16 |
11/64 |
0.750 |
| 5/16 |
18 |
24 |
0.3125 |
1/2 |
7/32 |
0.875 |
| 3/8 |
16 |
24 |
0.3750 |
9/16 |
1/4 |
1.000 |
| 7/16 |
14 |
20 |
0.4375 |
5/8 |
19/64 |
1.125 |
| 1/2 |
13 |
20 |
0.5000 |
3/4 |
11/32 |
1.250 |
| 9/16 |
12 |
18 |
0.5625 |
13/16 |
3/8 |
1.375 |
| 5/8 |
11 |
18 |
0.6250 |
15/16 |
27/64 |
1500 |
| 3/4 |
10 |
16 |
0.7500 |
11/8 |
1/2 |
1.750 |
| 7/8 |
9 |
14 |
0.8750 |
15/16 |
37/64 |
2.000 |
| 1 |
8 |
12 |
1.0000 |
11/2 |
43/64 |
2.250 |
| 11/8 |
7 |
12 |
1.1250 |
111/16 |
3/4 |
2.500 |
| 11/4 |
7 |
12 |
1.2500 |
17/8 |
27/32 |
2.750 |
| 13/8 |
6 |
12 |
1.3750 |
21/16 |
2/29 |
3.000 |
| 11/2 |
6 |
12 |
1.5000 |
21/4 |
1 |
3.250 |
|
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