I think they are straight thread, of course they could also be NPTF, but I can't visually see any taper in the threads. Nevertheless, my highly accurized, microscopic seeing eyeballs aren't what they used to be. It's obvious the threads used in/on the old hoses before were tight well before all the threads were used up, so my question might have been premature. I know I had to really bare down on the wrenches on the bench top to get these things to move!
The hose end to bushing is normal hose end and bushing to coupler is just to go from 3/8" hose size to a 1/2" Pioneer push/pull fitting. This is the way it's called out in the parts book. I don't work with hydraulic fittings much anymore and my recollect is getting dimmer.
I have to go back into town tomorrow so I'll pick up a tube of that Loctite 545. Needed or not it shouldn't hurt.
Thanks for straightening me out!