Thank you so much for the humorous and enlightening email. You are
right, I have to get the names right before I order. This has gone a
long way in helping me. The guys at the store don't seem to have time
to tell me, they said 'it is a pot with 5 pins', so that is where I
got the name from. Thanks again, at least you are giving me
specifics.

Mouser and Digikey and the like are parts distributors. They sell parts
made by many different companies. It is not their business to specify
which part you need for your application. They are not there to offer
technical support. They expect you to know what you want, and to ask for
it using correct terminology.

As others have pointed out, "five-pin pot" is not the correct
terminology. No one would have any idea what you're talking about. The
pot you have could be called a pot with an integral on-off switch.
Actually, it isn't integral at all - it's merely two separate
components; a rotary pot and a rotary SPST switch, fastened together
mechanically for your convenience.

In order to acquire a suitable component for your application, be
prepared to provide at least the following:

Resistance (e.g. 1k ohm)
Power rating (e.g. 2 watts)
Taper style (linear or logarithmic)
Mounting style (the threads you want mean that it is a "chassis mount"
pot, i.e., meant to be fastened to the front panel of an enclosure -- as
opposed to a "board mount" which would be soldered to the circuit board
but not to the chassis.)

You're going to get strange looks if you walk into a restaurant and ask
for some "mixed up unborn chickens" instead of asking for "scrambled
eggs."