It is easy to look up a conversion table to verify what needs to be done. I had to. I have a Starrett electronic caliper to do measurement conversion this small . No problem on my socket sets , I'm on it !
With that being said , I'd go w/the clearance I mentioned above. And I have std. and metric feeler gauges . I remember the first time I saw .25 on a piston crown it took someone explaining , that is also 0.010".
p.s. don't take everything literally. As you can see print can be deceiving .