In article ,
Roger Hayter wrote:
That's why I said "not the named slze, obviously". What I am getting at
is that several Whitwoth nuts in the series from about 1/8" to 5/8"
don't seem to have a crossflats size that fits a common AF spanner.
Surely I can't have dreamt this?

You haven't. But no different from metric. Some metric spanners may 'fit'
BSW or Unified nuts too.

--
*If at first you do succeed, try not to look too astonished.

Dave Plowman London SW
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