以下表格为公制螺纹的截面积表，这里仅争对公制的外螺纹。截面积的意义是计算受力面积所需的条件。我们知道M8的螺栓的截面积并不是4*4*3.14（半径的平方*3.14），M8的螺纹直径并不是8.0且螺纹部分不计入截面积，故以下表格为实际截面积，供参考：
公制粗牙螺纹的截面积表：
（注：下表中的mm2指的是平方毫米，由于这个上标2不好标出，特此说明）
公制粗牙螺纹的截面积表
| 粗牙螺纹 | |||
|---|---|---|---|
| 螺纹直径d | 螺距P | 应力截面积 As | 内径d1 |
| mm | mm | mm2 | mm |
| 1 | 0.25 | 0.460 | 0.729 |
| 1.1 | 0.25 | 0.588 | 0.829 |
| 1.2 | 0.25 | 0.732 | 0.929 |
| 1.4 | 0.3 | 0.983 | 1.075 |
| 1.6 | 0.35 | 1.27 | 1.221 |
| 1.8 | 0.35 | 1.70 | 1.421 |
| 2 | 0.4 | 2.07 | 1.567 |
| 2.2 | 0.45 | 2.43 | 1.713 |
| 2.5 | 0.45 | 3.39 | 2.013 |
| 3 | 0.5 | 5.03 | 2.459 |
| 3.5 | 0.6 | 6.78 | 2.850 |
| 4 | 0.7 | 8.78 | 3.424 |
| 4.5 | 0.75 | 11.3 | 3.633 |
| 5 | 0.8 | 14.2 | 4.134 |
| 6 | 1 | 20.1 | 4.918 |
| 7 | 1 | 28.9 | 5.918 |
| 8 | 1.25 | 36.6 | 6.647 |
| 10 | 1.5 | 58.0 | 8.376 |
| 12 | 1.75 | 84.3 | 10.106 |
| 14 | 2 | 115 | 11.835 |
| 16 | 2 | 157 | 13.835 |
| 18 | 2.5 | 192 | 15.294 |
| 20 | 2.5 | 245 | 17.294 |
| 22 | 2.5 | 303 | 19.294 |
| 24 | 3 | 353 | 20.752 |
| 27 | 3 | 459 | 23.752 |
| 30 | 3.5 | 561 | 26.211 |
| 33 | 3.5 | 694 | 29.211 |
| 36 | 4 | 817 | 31.670 |
| 39 | 4 | 976 | 34.670 |
| 42 | 4.5 | 1120 | 37.129 |
| 45 | 4.5 | 1310 | 40.129 |
| 48 | 5 | 1470 | 42.538 |
| 52 | 5 | 1760 | 46.588 |
| 56 | 5.5 | 2030 | 50.046 |
| 60 | 5.5 | 2360 | 54.046 |
| 64 | 6 | 2680 | 57.505 |
| 68 | 6 | 3060 | 61.505 |
以下是公制粗牙螺纹的截面积表：
公制细牙螺纹的截面积表
| 细牙螺纹 | |||
|---|---|---|---|
| 螺纹直径d | 螺距P | 应力截面积As | 内径d1 |
| mm | mm | mm2 | mm |
| 8 | 1 | 39.2 | 6.918 |
| 10 | 1 | 64.5 | 8.918 |
| 10 | 1.25 | 61.2 | 8.647 |
| 12 | 1.25 | 92.1 | 10.647 |
| 12 | 1.5 | 88.1 | 10.376 |
| 14 | 1.5 | 125 | 12.376 |
| 16 | 1.5 | 167 | 14.376 |
| 18 | 1.5 | 216 | 16.376 |
| 20 | 1.5 | 272 | 18.376 |
| 20 | 2 | 258 | 17.835 |
| 22 | 1.5 | 333 | 20.376 |
| 24 | 2 | 384 | 21.835 |
| 27 | 2 | 496 | 24.835 |
| 30 | 2 | 621 | 27.835 |
| 33 | 2 | 761 | 30.835 |
| 36 | 3 | 365 | 32.752 |
| 39 | 3 | 1030 | 35.752 |
| 45 | 3 | 1400 | 41.752 |
| 52 | 4 | 1830 | 47.670 |
| 56 | 4 | 2144 | 51.670 |
| 60 | 4 | 2490 | 55.670 |
| 64 | 4 | 2851 | 59.670 |
| 72 | 6 | 3460 | |
| 76 | 6 | 3890 | |
| 80 | 6 | 4340 | |
| 85 | 6 | 4950 | |
| 90 | 6 | 5590 | |
| 95 | 6 | 6270 | |
| 100 | 6 | 7000 | |
| 105 | 6 | 7760 | |
| 110 | 6 | 8560 | |
| 115 | 6 | 9390 | |
| 120 | 6 | 10300 | |
| 125 | 6 | 11200 | |
| 130 | 6 | 12100 | |