In an earlier contribution to this discussion,
fred wrote:


Sorta like 12710/12716 he
http://www.bes.ltd.uk/products/121.asp (near the bottom)

Maybe the way to go is to use a 12716 pushed into the socket, and to shorten
the steel pipe so that it just buts up to it. You can then use a
http://tinyurl.com/a5lww to join the steel pipe to the top of the 12716.
--
Cheers,
Set Square
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