Instead of any plastic I use a washer (thrust bearing washer) instead. I believe they are ground to .005, good enough for me.
For the chuck to get stuck the washer would have to "stick" to the headstock and also to the chuck. I'v never had a problem but do apply a light oil to each side.
https://www.amazon.com/Koyo-TRC-1625...9246260&sr=8-6
Almost any size is available; bore, exterior, and thickness.