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You know what I'd do with that bare hanger end? Since this is an off-road truck and the exhaust system is subject to jars and bumps that a street car would never see, I'd buy a tap, thread the very end of that hanger, and lock-tight a nut on the end so it can't slip out of the rubber hanger.
A "die" is what you would use. A tap threads a hole.
Yes, a die indeed. Apparently, it's not an easy feat to find the die I'm looking for (1/2"-13 NC Hexagonal shaped). Been looking for this thing for a while now and can't seem to track one down...
Maybe a local machine shop would have one.