there is no possible way it can thread.
i have one that will thread, it's green and the threads look different than the others, but its airy.
i don't get it at all.
i know what you mean about the pressure, but the clearo's just spin regardless.
i think this is a crap product and sooo upset that this is my second one and has been unusable out of the box both time.
maybe all the clearos are bad? but then why won't the vivi nova fit? also tried my aspire bdcs nope.
so nothing fits the battery!
everything else i own is ego threaded

i have two 510 bdc's and the mini nova, i also have the kangert4's, that's all the 510 i bought so i could use on this itaste battery!!!!!!) so even more money wasted.
somebody feel my pain lol.