CalculationThread Measurement
Free thread measurement calculator
Calculates the three-wire measurement for a symmetrical external thread.
Formulas
dw = P / (2 cos(α/2))M = d₂ + dw · (1 + 1/sin(α/2)) − P / (2 tan(α/2)) Sources: DIN 2269: thread measuring wires; geometric three-wire method.