I don't know off hand where to buy a socket for this nut, but unless I was
going to be using it everyday, hare is what I would do. Measure the outside
diameter of the nut and then find a 6 point socket with the same outside
diameter. (Hey who says those made in China sockets are good for nothing?)
Use an abrasive cutoff wheel to cut 6 wedge shapes out of the socket and
carefully fit the remaining socket into the nut.

Cost in the 2 to 3 dollar range including the dozen or so dremel wheels you
are going to go through.

Or you could spend a week tracking down a factory made one and spend 20 to
30 bucks.

--

Roger Shoaf

About the time I had mastered getting the toothpaste back in the tube, then
they come up with this striped stuff.

"The Hurdy Gurdy Man" wrote in message
news:wymCd.25307$_62.19585@trnddc01...
I've shamelessly stolen this question from an online forum I peruse now
and again, but knowing what I know about the folks over there I'm betting
there's a better chance the answer will be found here. I'm genuinely
curious to know the answer since I'm into trivia like this, so here goes.

Someone has a nut that looks like this:

http://www.aernovo.com/newspics/nut1.jpg

And, according to someone else, it requires a socket that looks like this:

http://www.aernovo.com/newspics/spanner3.jpg

That socket image is taken from a 70s-era Snap-On catalog, supposedly.
Web
searches for information about "spanner sockets" turned up very little of
any use. Mostly it was for sites selling what most folks think of when
they hear the word spanner, and not some sort of crazy faux-castellated
nut
turner.

So what is the current terminology for that kind of nut? And what's the
socket for it called? I've seen those sockets for sale before at my local
well stocked tool store, but can't find them online anywhere under that
name which leads me to think that's not the modern term for them. Anyone
know? Thanks!