The Daring Dufas wrote:
wrote:

This part was in a catalog of rigid conduit fittings. It is just like
a reducing bushing, threaded inside and out, but it
also has a "hex nut" flange one one end so it can be turned with a
wrench. What are these normally used for?
Another clue-- the part is a Thomas & Betts 1250. Could this be
used to enter a box that has a knockout that's
a size too big?

--zeb


If this is what you're talking about,

http://www.tnb.com/ps/fulltilt/index.cgi?part=1250TB

You would use it to attach 1/2" conduit or a fitting
to a cast "Malleable Iron" box or condulet that has
3/4" threaded hole. You would screw the 3/4" part
into the box or condulet using the hex flange to
tighten it with a wrench. You would then screw your
1/2" conduit or fitting into internal part of the
adapter.

TDD


Shucks, I thought the OP's subject line was a lead in to this lim:

The cock of a fellow named Fred
Was adorned with a spiralized head.
When at last he laid eyes,
On a **** the right size,
He was foiled by a left-handed thread!

Jeff

--
Jeffry Wisnia
(W1BSV + Brass Rat '57 EE)
The speed of light is 1.8*10^12 furlongs per fortnight.