Not that quickly, maybe give it 6 or so... years...
It was more to do with the pressure and rubbing of the metal on metal that did it.
Stainless is notorious for it.
Many times i have almost ruined a job at work by making the tollerances too tight.
Screw the check thread on and then when you screw it back off the friction, from no lube, heats up the job just a little which expands the metal and then there is no clearance between the two parts and they start rubbing and get hotter and expand and so on until it jams
Then if you keep trying to undo it you will essentially fusion weld a small bit together and if you keep applying more force it will pull that small bit out of position and you are basically fusked and have to remake the job and a new check thread.
If it jamms or starts to squeak/squeal then cool it down immediatly, walk away for 15mins and the tollerances expand again and you can get it apart again.
So always use lube, especially with stainless.
I would use "never seize" or "copper kote", not to worry about contamination as you only use a rice grain sized bit in the nut and the thread is no where near the inside of your still.
And you should never really touch the thread under the nut anyway.
Actually i am positive there is a food grade version you can get if you are really worried.
"Here"Or something similar.
So yeah up to you now.