I assume you need a knob to fit it.
Depends how long you need & if its US or Jap made.
Some 1960's Zeniths used fairly long knobs ( apx 2-4" )
that had a split shaft & wrapped with a spring that
you could put on many sized shafts.
In the good old days we had knob boxes. If someone came
in looking for a knob we would hand them the box & tell them to
take a few free. On top of that we also had 30-50 common
new knobs in stock. The knob box was more popular than the
tube tested especially on Saturdays. God I miss them days

I am sure many here have a knob box & can
help with a few knobs.
73 Zeno