Originally Posted by yachtie
4ths 8ths 16ths and that's it. No measurement in SAE is 27ths or 39ths
Nice try though, you're not from around here are you?
But I do live here
And in your earlier post you spoke off base twelve and sixteen, thus conceivably some high denominators. Anyway, I now deduce that American builders are only 2/3th as accurate as 'metric' ones. 2/Anyway, depending on the figure behind the comma the denominator is always the same for all the fractions: 10, 100, 1000.