Those funny 311-0603-00 pots


I thought the white part is made of Delrin, but so far it has shrugged off every glue and solvent I threw at it.
MEK, dichloromethane, hot glue, cyanoacrylate, plastic bonder epoxy, nothing affects or sticks to it.

How can I be sure the material is Delrin, and not say, Nylon?

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