| https://www.amesweb.info/Screws/Internal-Metric-Thread-Dimensions-Chart.aspx | |
| https://www.engineersedge.com/thread_strength/internal_screw_threads_chart.htm | |
| dMajorMax = dMajorMin + 1.01 * (dMinorMax - dMinorMin) | |
| formula empirically derived from metric tolerances | |
| https://www.engineersedge.com/hardware/metric-external-thread-sizes1.htm | |
| https://www.engineersedge.com/hardware/metric-external-thread-sizes2.htm | |
| dMinorMin = dPitchMin - (dMajorMax - dPitchMax) * 0.948 | |