On Apr 7, 5:40 pm, "AE Todd" wrote:
I am looking for something like a rivet, but instead of joining two
thin pieces of something, I want to join a square post that is an inch
thick to a U-shaped chanel, so that the post will able to revolve. A
rivet would do, but it won't span the 1.5" that makes up the thickness
of this area. BTW, the thing is made of aluminum. Any ideas?

There certainly are long rivets, although not so common in the local
five- and dime type hardware. Not certain of the geometry you're
trying to describe, but if a through rivet will work, so should a bolt
w/ nylon self-locking nut or a double locknut. Or, a through bushing
slightly longer than the thickness to tight the bolt down against.
Myriad of possibilities...