I need some help firstly in identifying a particular metric lead screw then selecting the proper tap to make a suitable replacement nut for it. The diameter of the screw is approximately 17.9 mm and the slide it's in moves 2 mm for each turn of the screw.
I'm assuming that this would therefore be a M18X2 screw for which there are taps available. Only problem is that the thread looks more ACME than the standard thread type and nobody seems to sell ACME metric taps even though I've seen ACME metric lead screws available. Any help would be appreciated.