"bob prohaska" wrote in message news

I'd like to service a shower valve in a 1957 house with original plumbing.

The bonnet nut uses a round boss 7/8" in diameter with two flats milled
in it about 3/4" apart. It'd be a cinch if the valve stuck out of the wall,
any open-end would fit. Unfortunately it's recessed about an inch behind
the
tile, so a socket is reuquired.

All the wrenches I can find fit hex nuts, does anybody know the correct
name
for the required tool? From time to time "nuts" like this have crossed my
path, but I've never encountered one used in a position that requires a
socket to grab it.

At this point I don't even know what to look for. Correct terminology would
help a great deal.

Thanks for reading, and any guidance.

Big question is how big is the hole in the tile? If it's big enough you
could get a crow's foot wrench in there, or a sink wrench (think right angle
pipe wrench on the end of a T handle). Google or search amazon.com for
pictures of both. Or make a socket by milling a deep 3/4" wide slot in the
end of a piece of 1" square bar and turn it with a big adjustable wrench.

--
Regards,
Carl Ijames