^ Ah, brilliant simplicity. Just take the head off of it!
Interesting about that o-ring Dukie, I had no idea there were good ones inside of lighters. I'll have to look into it. Ah, I see you're right about the threads on there. Not sure what I was thinking, I think the recessed area around the threads led me to believe it was a thread-sert. That's usually why I see a cut like that but now I realize it's to allow the bolt to seat.