Thread measuring wires are used to quickly & accurately measure pitch diameters of external threads with a micrometer.
16 sets of wires ranging from 0.018" to 0.185" will measure:
- U.S.60° 48tpi to 3tpi
- Metric 60° 0.5mm 6.0mm pitch
Supplied with a set of flexible wire holders all stored in a plastic case.