On Thu, 31 May 2018 14:05:29 -0700 (PDT), "
wrote:

On Wednesday, May 30, 2018 at 4:32:43 PM UTC-5, Clare Snyder wrote:
On Wed, 30 May 2018 13:23:47 -0700 (PDT), "
wrote:

I doubt the gripping rings on the tail end of the pipe clamps will grip the EMT. The gripping rings are chromed steel. The EMT is chromed or some kind of gray plating. Its slick. I don't think the rings will grip the slick EMT pipe. So no clamping force. I don't think it will grip enough to even dent the thinwall EMT. It'll just slip.
EMT is NOT chromed, it is electro-zinc plated.

OK. But my point is still valid. I don't think the grip rings will work on the electro zinc plated coating. Too slippery.
They work fine on clamps that come with electrozinc plated "pipes"
from the factory. If the tube is the right size they will hold - but
EMT is not the same size as pipe, and is too flimsy -0 the grip plates
will deform the tube.