Thread your fastener into holes or onto plugs for quick and accurate size identification.

Determine threads per inch and thread pitch on a variety of external and internal threads.

Use on external and internal fastener threads.

Identify threads per inch on external threads and find the center of your workpiece to line up thread cutting tools.

Check external NPT thread size and taper.

Find tube, pipe, fastener, wire, and drill bit sizes with one tool.

A notch on the handle indicates when the internal NPT threads you’re checking are in tolerance.

Check a part’s external threads to ensure they fall within tolerance.

To ensure accuracy of NPT pipe thread measurements, these gauges include a certificate of calibration traceable to NIST that states they’ve passed a test for accuracy.