fsardone
Solo Diver
Hey Doc, we also have 7 mm drillsMetric or imperial. Fractional or decimal. Use what works for you. I can convert fractions to decimal equivilants fairly quickly. My favorite thread is 1/4-20 which needs a #7 drill. A 6mm x1.00 is just a bit too thin and an 8mmx1.25 is to big. Might as well go to a 5/16-18. While it's getting easier to get metric hardware, I still find a better variety in imperial. Give me dimensions and I'll build it. I am not constrained by only one unit of measurement.
and in specialized places (for small drill bit) you also get the half millimeter ones 6.5 7 7.5 and 8 ....