This part is discontinued.
We still have some parts available, but do not call us for more then we
have!
There are many possible solutions. You can replace it with the #34 air
control.
This part is smaller, but the thread diameter behind is the same.
However, it is possible that this part is too small to cover the entire
flange.
To solve this problem, you can buy the escutcheon below.
It will hide the flange.
If the design doesn't suit you, you can change the insert from fine to
coarse and use the plastic #14 air knob.
The insert might be glued. We suggest professionnal installation