Can I retap a 1/2" 24tpi UNF female thread -> M12?

[HankMcSpank]

Why not buy (or borrow) a 1/2" UNF bolt, cut the head off then drill it out to suit your stepper then put in a couple of grub screws in to hold it place.

JD!

Super idea.... I guess some folks know how to go about this the right way & some folks don't (I'll be in the latter camp - so thank heavens for forums like this!)

(BTW: For once, I already have some suitable 1/2" 24tpi bolts!)