@ozzietoker
You've got a metal stem.
When people mention (14/14.4)mm or (18/18.8/19)mm they are referring to standardized scientific ground glass joints.
You'll cause some confusion referring to a "standard" metal 14mm stem
. As far as I can tell they've all but disappeared from the US market.
The bongs we've got here in aus are pretty archaic by US standards, but they get the job done in a pinch.
A bonza stem is very similar to what
@Tweak posted, not quite sure why you said it wasn't at first?
Anyways, I'd suggest you check out the glass 101 thread in the glass section, there's some good discussion in there for new entrants into the glass game.
I know all the terminology can get confusing/overwhelming at first, but you start to pick it up pretty quick once you get a grasp of the fundamentals.
As for what you need, a 14mm adapter just like at the top of this page will make a good seal with an agung stem.
With proper glass 14mm joints on the downstem, you can just jam the SSV tubing straight in there and make a seal, but the agung stem is a little bit wider than a glass joint, so you'll need the adapter.
Also, not to throw too many options at ya, but if you're purely gonna use your vape through a bong, I'd suggest the LSV over the SSV.
Just another lovely vape to consider
I'm on my phone right now so I can't do links, but feel free to pm me and I'll be happy to go through everything you'd need with links later today