Thread gages

[RoninPA]

From the thread about replacing the grip locator pin it was mentioned about thread gages;

Brownells has them for both standard and metric, $15-$20 Standard goes from 1-48 to 5/16-32

https://www.brownells.com/gunsmith-tools-supplies/measuring-tools/thread-pitch-gauges/screw-chek-r-prod775.aspx

Comes in real handy when checking screw sizes from older guns that didn't use what now are common threads. Also it is hard enough to clean up slightly battered threads, but don't use it to try to fix really beat up, stripped threads, get your dies or thread restorer out for that work (or buy new ones from a major industrial parts place like McMaster-Carr).

 

[NikA]

My preference is for a leaf-style thread pitch gage and a pair of calipers, but to each their own. Measuring screw threads can be a very deep rabbit hole.

 

[contender]

I have such gauges,, of both types mentioned. Between them,, and my machinist handbook,, I can figure out most any thread pitch or whatever. But the gauges are quick & simple for sure. Of course,, I enjoy good tools anyway,,,,!