ETP Flexel EMT flexible fittings are available in 1¼-in. to 4-in. trade sizes with stub fittings on both ends to allow for use with set-screw and compression fittings ETP Flexel EMT flexible fittings ...
Article 358 covers the use, installation, and construction specifications for EMT and associated fittings. As noted in Sec. 358.42, "Couplings and connectors used with EMT shall be made up tight.