https://www.youtube.com/watch?v=k2VS2oOlHRE
That nut/bolt size and pitch thing is tempting...I tend to either match stuff up (like if I have a bolt and need a nut, I just find one that fits - it doesn't really help if I know what it is if I am not buying one), or use my tap/die set to size it up. That thing would be fancier.