The Stovebolt Site Forums The Shop Area Engine Shop bolt sizes and TPI

Great write-up and solid advice. The one thing I would like to add is a thread chart and this is coming from my machinist background. I know you said you don’t have to learn decimals like you and I did, but unless you have a calipers that read in fractions, (yes they do make them), most calipers read in thousands or tenth of an inch (I have a cheap plastic one that reads in tenth’s) you’ll have to convert from decimals to fractions. As a career machinist, I have most common ones in my head but a thread chart makes this easy, in addition it will give you the drill size for taping a new hole.

I’ve attached photos of mine. Just my two cents!