螺纹规格（D） Nominal Size,in.(D) | 牙数 Threads/ln. | 应力截面积 Stress Area,Ain2. | 牙数 Threads/ln. | 应力截面积 Stress Area,Ain2. | 牙数 Threads/ln. | 应力截面积 Stress Area,Ain2. |
| 1/4 (0.250) | 20 | 0.0318 | 28 | 0.0364 | ||
| 5/16 (0.3125) | 18 | 0.0524 | 24 | 0.0580 | ||
| 3/18 (0.375) | 16 | 0.0775 | 24 | 0.0878 | ||
| 7/16 (0.4375) | 14 | 0.1063 | 20 | 0.1187 | ||
| 1/2 (0.500) | 13 | 0.1419 | 20 | 0.1599 | ||
| 9/16 (0.5625) | 12 | 0.1820 | 18 | 0.2030 | ||
| 5/8 (0.625) | 11 | 0.2260 | 18 | 0.2560 | ||
| 3/4 (0.750) | 10 | 0.3340 | 16 | 0.3730 | ||
| 7 8 (0.875) | 9 | 0.4620 | 14 | 0.5090 | ||
| 1.000 | 8 | 0.6060 | 12 | 0.6630 | ||
| 1 1/8 (1.125) | 7 | 0.7630 | 12 | 0.8560 | 8 | 0.790 |
| 1 1/4 (1.250) | 7 | 0.9690 | 12 | 1.0730 | 8 | .000 |
| 1 3/8 (1.375) | 6 | 1.1550 | 12 | 1.3150 | 8 | .233 |
| 1 1/2 （1.500） | 6 | 1.4050 | 12 | 1.5810 | 8 | .492 |
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