Thomas & Betts Nylon Insulated 90 Degree Short Elbow, Malleable Iron

Three trade sizes: 1/2 inch (part 4290), 3/4 inch (4291), and 1 inch (4292). Order by the conduit trade size you are running, not by the outside diameter of the pipe.

Yes. The 4290, 4291 and 4292 short elbows are threaded rigid/IMC conduit fittings, so they make up to the tapered threads on threaded rigid steel or intermediate metal conduit. They are not intended for EMT, which is unthreaded and uses set screw or compression fittings instead.

The nylon insulated throat lines the opening where the conductors turn, so the wire is not pulled across a bare metal edge during the pull. It protects conductor insulation on a 90 degree change of direction, which is the point in a run where jacket damage is most likely.

The body is malleable iron, with only the throat insulated in nylon. That means it stays part of the metallic raceway and carries the equipment grounding path through the threaded connections, unlike a non-metallic fitting.

A short elbow like the 4290 series makes a tight 90 degree turn where you only need to change direction and no access is required. If you need to open the run to pull or splice, or the pull would be too hard around a sealed bend, use a conduit body with a removable cover instead. Short elbows also have a tighter radius than a factory sweep, so check your conductor bend radius before committing to one on a large-conductor pull.

The 4290 series is a malleable iron rigid/IMC fitting, which is the class of fitting normally run outdoors with threaded rigid conduit. Nothing in the product data states a corrosion rating or an environmental listing for it, so for a wet, corrosive or washdown environment specify a fitting whose finish and listing are called out for that service.