Mount to a wall for easy access, and 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.

Find thread size, screw size, thread pitch, diameter, and drill bit size with one tool.

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

In addition to checking NPT and BSPT pipe sizes, use the two included gauges for measuring thread pitch.

Determine pipe size and inner and outer diameter.

These have a go gauge on one end and a no-go gauge on the other end.

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.

Inspect fasteners and verify threads with this checker.