Calculation

Thread Measurement

Created on · thread-measurement

Calculates the three-wire measurement for a symmetrical external thread.

Pitch diameter

Pitch

Flank angle

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.