What is the correct name of the out take tube and base that moves the air from the bellows to the bag. It’s frequently made of wood, brass, copper and even pvc.
NPU calls it a “bellows connector” (http://store.pipers.ie/store/product/8092/Rubber-Bellows-Connector/) but I think I’ve heard them called blowtubes or something like that. What about bag-hoses (instead of hosebags 
)?
There is indeed a hose that connects bag to bellows - via a stock and blowpipe.
That from the bellows, that carries the hose, connecting it to the bellows via a permanent connection - perhaps should be called the connecting flange.
What a great word, like gussett, for the leather flexible element of the bellows, and bush - for the carrier of the flexible leather flap, that shuts off the air.
Pwrt
Many years ago, I’ve heard the word “nozzle” for the connecting hose.
Another nice word…
Thanks so much! What I’m actually looking for is the name of the brass part that the bellows connector is plugged into on the bellows end that is fastened to one of the bellows clappers. One side of the bellows has an intake valve. The other side has a ----------? While I’m asking, is the OD of the brass tube on this thingme 5/8, 3/4 or 7/8 inch?
The OD of mine is 5/8".
Thank you Bob! 5/8" is what I purchased. So, I’ll be making up some 5/8" thingme’s next week.
I always liked ‘widget’ and ‘gizmo’ But ‘thingme’ will do nicely 
Bob
It is often called the Outlet Flange.
Thanks Mike! Outlet Flange is a little more descriptive than thingme. I see David Daye describes them as air outlet tubes and air exit tubes, which I quite like. So far, outlet flange sounds the best for the whole apparatus.