"Lee Michaels" wrote in message
Knowing your application, I wonder if a barrel nut and machine screw may
not
work. They are often used in indoor applications, expecially for bed
corners. If you were to bury the nut or cover it with a plug, etc you may
be able to get away with it.

I'm going to be routing out a dado for the 6' steel stringer. Other than
just laying a strip of wood of the entire length of the open dado, I was
trying to envision some type of covering that was a little more exotic.