As a qualified pipe fitter, I can say that it definitely exists in steel, and that in the US it's plastic equivalents are the same dimensions.
I am trying to pin down that perfect Australian material for the Stampede breach cover, and I'm not satisfied with the options available so far.
I see the yanks have already started making it from 1/2" sched 40 PVC, with the 9/16 brass nested in a couple of 19/32 rings inside it.
This seems the best option to me, as I don't like the idea of sanding out electrical conduit, etc.
I like the idea of making the whole thing out of one piece of this PVC, with the full length of 19/32 epoxied into it (with no tape or crap like that), then cutting the breach out of it.
That'd be rock solid, and wouldn't need reinforcing around the breach I reckon.
I'd get it on a lathe and turn down the ends to fit the nose and collar...
Getting a bit more like a write up...so:
Does anyone know where to get 1/2" sched 40 plastic pipe in Australia?