Thread milling shallow bind hole

[komatias]

You could also use a roll tap, just interpolate a flat bottom hole first then tap to depth. A roll tap would be cheaper than a thread milling cutter.

Woukd nit fancy my chances of forming M12s in 316, the bugger galls to easily
Be sure to get a threadmill that is big enough to cut the pitch you need. Bought a 6mm one the other day, can only do up to 1mm pitch....

A larger threadmill will do smaller pitches though may not be able to get into small holes