EVT steel set screw connector is part of UL listed EMT fittings. The set screw EMT connector is manufactured according to UL 514B and C22.2 No. 18.3-12 Conduit, Tubing, and Cable Fittings.

EMT screw connector steel is used in dry locations to bond Electrical Metallic Tubing to an electrical box. EVT can also provide EMT connector in zinc and aluminum. Please note that aluminum EMT connector is not a UL listed product. Therefore, it should not be used in a project if UL certification is required.

The steel EMT set screw connector provides concrete tight protection when taped and is available in trade sizes 1/2" through 4". EMT connector set screw type sizes 2-1/2" to 4" is also suitable for Rigid and IMC Conduits
https://www.evt-electrical.com/emt-fittings/emt-connector/set-screw-connector.html