Joined: Feb 2012
Posts: 19,379
Likes: 5,524
From: Rochester, NY
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB
The M6 tap is a 6mm x 1mm per thread. Not .75mm per thread. MY understanding is that the "M" references a single "standard" thread pitch, in this case 1mm per thread. Andy
BTW this type of info is readily available by a quick Google search for tap drill size. (Just like a lot of other info) Andy
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AndrewRStewart