This might not be the answer to the OP, but someone was fitting these down inside a Vamo or something.
View attachment 253414
Tank Airflow Controller
This, if you could EVER find one in stock, is a good way to prevent the problem in the first place.
I keep checking, as I plan to buy one - JUST IN CASE I eventually pick up a VAMO.
This thing goes in and stays there, so you don't ever strip the VAMO's 510 threads. If these threads strip - it's just $3...
Found the following vendors who have them in stock:
Kidney Puncher - Tank Airflow Controller
Vermillion River EJuice - Tank Air Flow Controller
Tropical Vapors - Tank Airflow Controller for 510-Threaded APVs
Never dealt with any of them, but heard good thing about Kidney Puncher...