
This is an 8-32 thread, not M3. Standard, not metric. Too large a set screw hole in my Ender 3 heater block. It also required me to edit my firmware, which required me to learn how to edit my firmware. I had to drill and cut an 8-32 hole to make it fit. Then the sensor was defective. I guess the big black "X" written as a marker on the packaging should be a clue. Very upset that I wasted so much time on this thing. Replacement should be here soon. I will update when the experience is better.

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