A while ago someone was looking for a source of hollow threaded rod.
One source suggested was recycling a presta valve stem off a dead bike inner tube. (or a new one if you don't ride on rough roads)
This item is about an inch long, with a ~4mm inner diameter.
I was looking for a banana plug coupler today and found these to serve. They'll even fit into HV shrouded banana plug shells - which was the particular application here.
The threading was not an issue, but could be used for rt angle or PCB mounting. Material is easily machined nickel-plated brass.
Save the tube material for patches or other uses
- spanner handle grips - rubber bands (cut on bias for length. etc.
re threaded hollow rod - a more rugged part can be had using a bike axle from a quick- release assembly. These are tempered steel with threading extending for most of their length (~5inches or so).
Wouldn't have thought of axles if I hadn't broken one (after 30+ years). Unbroken axles are more easy to get ahold of, of course.
RL