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

Determine threads per inch and thread pitch on nuts, bolts, and other fasteners.

Use on external and internal fastener threads.

Identify Acme threads and use as a guide while grinding and cutting Acme threads to a 29° included angle.

Check external NPT thread size and taper.

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

Take the guesswork out of determining a grease fitting’s thread type and size.

Check a part’s external threads to make sure they fall within tolerance. You can use these for bolts, threaded rods, bits, and more.

These gauges come with a certificate that’s traceable to NIST, confirming they were calibrated in a lab. Use them to verify whether external pipe threads are within tolerance.

Not only were these gauges calibrated in a lab, but they also come with a certificate that's traceable to NIST.

These gauges come with a certificate of calibration traceable to NIST that states they’ve passed a test for accuracy.

Test if the left-hand threads on parts fall within tolerance.

Calibrated in a lab and backed by a certificate traceable to NIST, these gauges check if left-hand threads fall within tolerance.

Use these gauges to check the outside diameter of shafts, rods, and other cylindrical objects to determine whether they’re in tolerance.

Often used with go and no-go ring gauges, these holders keep two ring gauges still for quick, repeat measuring.

These micrometers come with a calibration certificate traceable to NIST that states they've passed a test for accuracy.