よくある質問

Questions on Screw Thread Gauges

Please click the questions below.

What is the pitch diameter of a screw thread?

Can we inspect the threaded shaft product having tolerance of 6g (Class 2) using screw thread ring gauge having more tight tolerance of 4h (Class 1) ?

In conventional JIS, metric thread gauges and unified thread gauges are classified into manufacturing/working and inspection use, what is their difference? Does ISO based JIS also have such the classification?

How is the wear allowance provided of wear limit of thread plug gauge M20x1.5 GPNP-6H?

What is a standard thread gauge and how to use it?

What kind of thread pipe gauges, taper thread pipe gauges are commonly using now?

There is A/B marking on the GO side of PF parallel pipe thread plug and ring and ring of G standard. What does it mean?