Threaded insert for the sides of conduit

I’ve always had to weld a nut on the side of conduit to get a threaded place to fasten something. Usually it’s OK to put two holes in and put a bolt through with a nut on the back side. However, if you need to attach to the piece without access to the back, maybe because the conduit is fastened to a wall or another piece contacts the back side, or you just can’t easily access the back, you need a threaded hole on one side only. In the past I’ve always drilled a hole then welded a nut on the outside. Welding galvanized thin wall material is not easy , and you have to deal with toxic fumes. I’ve always been told threaded rivets only work on flat materials, they will not work on curved surfaces. Today I needed a threaded insert in conduit. No welder. So I called technical support at WW Grainger. They got the maker of their threaded inserts on the phone with us. The Engineer explained that threaded rivets can be installed successfully on conduit provided that the size of the rivet flange didn’t extend past the pipe. He explained the outside flange would make enough contact on the top and bottom to hold properly, as most of the fittings strength came from expanding the shoulder inside the fitting. I tried it on a scrap piece , drilling a 3/8 hole to accommodate a 1/4 inch thread rivet. It worked perfectly. I’ll be installing this finished piece with the threaded river installed in it later, I’ll follow up with any challenges. First picture shows an insert installed. Second shows a welded on bolt. Third picture is drawings of the rivet nut install process using a nut set tool ( they can be installed using pieces of hardware, this is critical so I wanted extra accuracy) 4, 5 insert installed, 6 view of the insert part, 7 welded on nut, and 8 ,9shows the threaded rivet. 7,10 and 11 show a welded on nut. 12 shows a manual threaded rivet set tool.