Best Practices for Measuring Screw/Bolt TPI?
A thread gauge is not tapped. A tapped gauge is attempting to show both size and threading, and can be limited by being too thin to correctly discern close metric/inch threads, for instance.
A thread gauge lets you worry about size, while it concentrates on accurately determining threading. Of course, you need to buy one that's not a hunk of poorly made junk...
You might &quot;prefer something else&quot; but your title asked for best practices. This is a problem with a tool that solves it; that is the best practice.