Captain Obvious Posted October 8, 2020 Share #13 Posted October 8, 2020 Glad you got it solved. Too bad the bolt stub didn't come out easily, but they never do for me either. Link to comment Share on other sites More sharing options...
CanTechZ Posted October 8, 2020 Share #14 Posted October 8, 2020 On 9/28/2020 at 7:30 PM, Captain Obvious said: M6 x 1.0 is used extensively all over the car, and while I did not look up that bolt specifically, I believe that's what it is. As for the official pilot drill size necessary, I'd have to look into that. There are rules for metric taps (that I never committed to memory), but it would be easier for me to instead just see what size drill bit fits snug into the threaded hole of a couple M6 x 1.0 hex nuts and just use that. Edit - You made me look... My crib notes says I use a 3/16 (.1875) drill for my pilot when tapping M6 x 1.0. It's probably a little undersize according to the rules, but that's how I roll. The basic rule for metric tap drill size is very simple. Tap drill equals thread size minus pitch, for M6x1.0 tap drill is 5.0mm (.1968"), closed imperial drill is #9, .1960". Here is a printable Starrett toolbox card with inch/metric tap drills and decimal equivalents that I have found very handy and a link on the Starrett website. https://www.starrett.com/docs/educational/decimal-equivalent-card---bulletin-1317.pdf Starrett-decimal-equivalent-card-imp-metric tap drill-bulletin-1317.pdf 1 Link to comment Share on other sites More sharing options...
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