"DK" wrote in message
They should absolutely never be loose enough that they can be turned
with the fingers.

Agreed.

Tighten with the fingers as far as possible and
then give them a 1/4 turn more. And more important, do it
periodically and repeatedly for the next 20 years.

That would be another 5 turns if done once a year. Chances are it will
bottom out and compress the packing. If it does not leak, don't touch it.