Left hand (reverse) thread

[uDude]

Is Appropriate way to get Left threads is mirror, e.g.,

mirror( v = [ 0, 0, -1 ] ) bolt("M8", turns = 20);

???
What about taper?

[adrianschlatter]

Hi @uDude

Yes, by mirroring you get a left-handed thread. However, I'm not sure whether these threads would conform to some standard. As far as I know, the threads currently in threadlib are defined to be righthanded and untapered by their respective norms.