I have a tool for turning the end of any steel rod into a thread one, an oil is used with it.
I have the steel rods too, was going to make a rack for hanging reference drawings on (24" x 36" sets), but gave up the office overhead to work out of the home years ago - no room for it now.
The fittings at either end as you pointed out could be a challenge to source or to custom fabricate. A nice little project, if I have the time.
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