<Sorry if this message shows up twice in your newsfeed>
This tool is sort of on the fringe of this newsgroup, but I never
saw it before today.
https://www.amazon.com/Bolt-Thread-Checker-Complete-Metric/dp/B06ZYD4SS8
It's gotta be doable for (much?) less than $50. You can treat it
as a "Guess what it's for" post! : ) I thought it would nicely
accessorize a tap and die set. I sought to find a tap and die
set at my local Sears "going out of business" sale, which my wife
told me about yesterday... but I could see I was late to the
party. It felt like a funeral at the store...I'll miss it. I
couldn't help but think of happier times (concrete memories of
this, that, and the other)...details omitted.