Tapping Drill Bits

[grez]

Probably not the right section but no idea which is - does anybody know where I can buy a set of tapping drill bits, I have the taps and dies but "mislaid" the drill bits.

 

[Gargy]

Normal drills will do, just as long as you have the correct size for the tap.

4.2mm for M5.
5.0mm for M6
6.8mm for M8
8.5mm for M10
10.2mm for M12.

 

[Smug]

Not quite, I does depend on the thread pitch. http://www.avontapdie.co.uk/tapping-drill-sizes