Smallest Diameter that a SD3 can print.?

I'm having issues on printing a small diameter bolt. I was just wondering if anyone might know what approximate is the smallest diameter that a SD3 (0.4mm nozzle) may print. Im not receiving any good prints. I try printing 5mm and I receive  4mm etc.

You will never be able to print threads on a M5 bolt.

I tend to agree with elmoret here. However, if your small shapes are not coming out the right size, you might consider checking how much backlash your machine has, and going about adjusting belts etc. to minimise that.

I have no problem whatsoever with printing 1-3/16ths - 16tpi inside threads

You can print very small very accurately - as long as you have long enough layer times to allow sufficent cooling. Your normal instinct would be to just slow the print down, but these leaves the nozzle hovering longer over fine detail and making it fail.. If I want very fine detail in a small layer, I tend to leave print speeds the same as 'normal' printing, make sure Layer Cooling is *disabled* - and then print lots of the buggers at once... This naturally extends the layer durations because the print head has to move between pieces and the print time of each piece is cumlative to the entire layer time..

Thats how I printed these tiny yoda's (thats a $1 Euro coin ...) ... not saying they are masterpieces.. but I didn't do any special calibration for these other than print 4 at once...:

Same ideas apply to small threads...