AutoCad 2D :: Draw U Bolt In Isometric Drawing?

I am trying to draw a "u bolt" in an isometric drawing. I found one solution, that served the purpose of giving the customer the general idea of the stands we are trying to sell them, but I'd like to know if there is a way to draw it properly.

I have attached a pdf to show what I came up with. Pipe Stands.pdf The only way I could think to get it to work (look right) in isometric view was to draw to vertical lines, make an arc across them with the elipseisocircle, and then use the path array to fill the U shape with the isocircles. This keeps the tubular shape, and the number of circles resembles bolt threads.

My problem is that the u-bolt is only threaded on the ends, the arched part should be smooth. Since this u bolt is to clamp fiberglass pipe to the stand, those threads (in my drawing) could cause damage. In this instance, I just explained this in the email to the customer, but I'd like to find a way to draw it proper.