B_L1996 This is the temperature sensor, not heater.. alot of 3D printers have a second slot for small temperature measure cartridge instead of mounting under that screw.

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xtRaymon21 It is the same type of thermistor E3D uses in the V5 and V6 J-head hotends and indeed have a different diameter and length as most commonly used heaterblocks. Therefore it can be a bit confusing to order when descriptions doesn’t mention the anomaly compared to other thermistors of the same category. What i should suggest you maybe able to do as a way to solve this problem (if you are handy with drilling machines and precise metal shop crafts again not afraid to use your skills….) Also if you weren’t able to send it back to the company that you’ve bought it from!!!! DIY, and bring in a small amount of deeper drilled hole of 2mm increments and also with a 2mm diameter drill, in the upper already existing M3 threaded ‘fastening’ point or ‘mounting’ point of the thermistor. If you just work it up to the dimensions of the thermistor’s length you’ll be golden.) For this result you will have a very good and secure working thermistor that will exceed the average measurement of your previous faulty one. This offcourse is just a tip without the encouraging word from me to you taking any risk worsening your problem with the purchase while there’s been a way easier solution to just buy a new correct piece for sure. 😉

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