[Hammarlund] Seeking compression nut/cable adaptor for Amphenol 83-821 Twin UHF plug

[David Wise]

A nice man on this list gave me an Amphenol 83-821, the plug that mates
to the original SP600 antenna connector, but the back end where the
compression nut or cable adaptor screws in is a finer thread than the
UG-176 et al that are used with the PL-259.  Does anybody have a source
for it, and what's the part number?

I can figure out some ad hoc solution, but I feel bad munging up this
shiny NIB connector.

(Why I didn't just put in an SO-239 when I was recapping the deck?
A short circuit.  Between the headphones!)

Thanks,
Dave Wise