York threads for valve stem


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Posted by Mike Johnson on May 17, 2003 at 03:52:14:

Could anybody please help.
I've just made oversized pistons fro my York 4/4 CC as the ones that were in it were not original and leaked. I have one original piston that came with the tuba and don't want to distroy it. As American thread isn't used here in the UK could anybody help with the sizes of:
A, the thread for the finger buttons
B, the thread(if the original isn't turned in one piece) at the bottom of the valve stem.

Thanks

Mike Johnson


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