美制螺纹尺寸对照表如下：
美制外螺纹（2A）常用规格极限尺寸表（粗牙）
| 公称尺寸和每英寸牙数 | 螺纹系列代号 | 大径极限 | 中径极限 | 小径max |
| --- | --- | --- | --- | --- |
| 8-32 | 2A | 0.164 | 0.1631 | 0.1399 |
| 10-24 | 2A | 0.190 | 0.1890 | 0.1586 |
| 12-24 | 2A | 0.216 | 0.2150 | 0.1845 |
| 1/4-20 | 2A | 0.250 | 0.2489 | 0.2127 |
| 5/16-18 | 2A | 0.3175 | 0.3113 | 0.2712 |
| 3/8-16 | 2A | 0.375 | 0.3737 | 0.3287 |
| 7/16-14 | 2A | 0.4375 | 0.4361 | 0.3850 |
| 1/2-13 | 2A | 0.500 | 0.4985 | 0.4435 |
| 9/16-12 | 2A | 0.5625 | 0.5610 | 0.4607 |
| 5/8-11 | 2A | 0.625 | 0.6240 | 0.5000 |
| 3/4-10 | 2A | 0.750 | 0.7485 | 0.6275 |
| 7/8-9 | 2A | 0.875 | 0.8740 | 0.7560 |
| 1"-8 | 2A | 1.000 | 0.9980 | 0.8750 |
美制外螺纹（2A）常用规格极限尺寸表（细牙）
| 公称尺寸和每英寸牙数 | 螺纹系列代号 | 大径极限 | 中径极限 | 小径max |
| --- | --- | --- | --- | --- |
| 8-32 | 2A | 0.164 | 0.1631 | 0.1399 |
| 10-32 | 2A | 0.190 | 0.1890 | 0.1586 |
| 12-32 | 2A | 0.216 | 0.2150 | 0.1845 |
| 1/4-20 | 2A | 0.250 | 0.2489 | 0.2127 |
| 5/16-18 | 2A | 0.3175 | 0.3113 | 0.2712 |
| 3/8-16 | 2A | 0.375 | 0.3737 | 0.3287 |
| 7/16-14 | 2A | 0.4375 | 0.4361 | 0.3850 |
| 1/2-13 | 2A | 0.500 | 0.4985 | 0.4435 |
| 9/16-12 | 2A | 0.5625 | 0.5610 | 0.4607 |
| 5/8-11 | 2A | 0.625 | 0.6240 | 0.5000 |
| 3/4-10 | 2A | 0.750 | 0.7485 | 0.6275 |
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