Have you ever puzzled over the precise measurements of pipe threads? Understanding the dimensions is crucial for ensuring a perfect fit in any piping system. This article offers a comprehensive dimension table for both standard and conical pipe threads, detailing key parameters like pitch, diameter, and thread height. By the end, you’ll have a clear reference to help select the right pipe threads for your projects. Dive in to simplify your piping needs and ensure seamless connections every time.
Unit: mm
| Dimension Code | Number of Teeth per 25.4mm, n | Pitch, p | Tooth Height, h | Approximate Radius of Arc, r≈ | Basic Diameter on the Datum | Datum Distance | Effective Thread Length | ||
| Major Diameter (Datum Diameter), d=D | Median Diameter, d2=D2 | Minor Diameter, d1=D1 | |||||||
| 1/16 | 28 | 0.907 | 0.581 | 0.125 | 7.723 | 7.142 | 6.561 | 4.0 | 6.5 |
| 1/8 | 28 | 0.907 | 0.581 | 0.125 | 9.728 | 9.147 | 8.566 | 4.0 | 6.5 |
| 1/4 | 19 | 1.337 | 0.586 | 0.184 | 13.157 | 12.301 | 11.445 | 6.0 | 9.7 |
| 3/8 | 19 | 1.337 | 0.586 | 0.184 | 16.662 | 15.806 | 14.950 | 6.4 | 10.1 |
| 1/2 | 14 | 1.814 | 1.162 | 0.249 | 20.955 | 19.793 | 18.631 | 8.2 | 13.2 |
| 3/4 | 14 | 1.814 | 1.162 | 0.249 | 26.441 | 25.279 | 24.117 | 9.5 | 14.5 |
| 1 | 11 | 2.309 | 1.479 | 0.317 | 33.249 | 31.770 | 30.291 | 10.4 | 16.8 |
| 1.1/4 | 11 | 2.309 | 1.479 | 0.317 | 41.910 | 40.431 | 38.952 | 12.7 | 19.1 |
| 1.1/2 | 11 | 2.309 | 1.479 | 0.317 | 47.803 | 46.324 | 44.845 | 12.7 | 19.1 |
| 2 | 11 | 2.309 | 1.479 | 0.317 | 59.614 | 58.135 | 56.656 | 15.9 | 23.4 |
| 2.1/2 | 11 | 2.309 | 1.479 | 0.317 | 75.184 | 73.705 | 72.226 | 17.5 | 26.7 |
| 3 | 11 | 2.309 | 1.479 | 0.317 | 87.884 | 86.405 | 84.926 | 20.6 | 29.8 |
| 3.1/2 | 11 | 2.309 | 1.479 | 0.317 | 100.330 | 98.851 | 97.372 | 22.2 | 31.4 |
| 4 | 11 | 2.309 | 1.479 | 0.317 | 113.030 | 111.551 | 110.072 | 25.4 | 35.8 |
| 5 | 11 | 2.309 | 1.479 | 0.317 | 138.430 | 136.951 | 135.472 | 28.6 | 40.1 |
| 6 | 11 | 2.309 | 1.479 | 0.317 | 163.830 | 162.351 | 160.872 | 28.6 | 40.1 |
| Dimension Code | Number of Teeth per 25.4mm, n | Basic Diameter on the Datum | Datum Distance | ||
| Major Diameter (Datum Diameter), d=D | Median Diameter, d2=D2 | Minor Diameter, d1=D1 | |||
| 1/16 | 27 | 7.895 | 7.142 | 6.389 | 4.064 |
| 1/8 | 27 | 10.242 | 9.489 | 8.736 | 4.102 |
| 1/4 | 18 | 13.616 | 12.487 | 11.358 | 5.786 |
| 3/8 | 18 | 17.055 | 15.926 | 14.797 | 6.096 |
| 1/2 | 14 | 21.223 | 19.772 | 18.321 | 8.128 |
| 3/4 | 14 | 26.568 | 25.117 | 23.666 | 8.611 |
| 1 | 11.5 | 33.228 | 31.461 | 29.694 | 10.160 |
| 1.1/4 | 11.5 | 41.985 | 40.218 | 38.451 | 10.668 |
| 1.1/2 | 11.5 | 48.054 | 46.287 | 44.520 | 10.668 |
| 2 | 11.5 | 60.092 | 58.325 | 56.558 | 11.074 |
| 2.1/2 | 8 | 72.699 | 70.159 | 67.619 | 17.323 |
| 3 | 8 | 88.608 | 86.068 | 83.528 | 19.456 |
| 3.1/2 | 8 | 101.316 | 98.776 | 96.236 | 20.853 |
| 4 | 8 | 113.973 | 111.433 | 108.893 | 21.438 |
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