Set Screw Coupling, 1-1/2″, Malleable Iron for Concrete-Tight Fit
https://nsiindustries.com/product/set-screw-coupling-1-1-2-malleable-iron-for-concrete-tight-fit/
The Bridgeport 1-1/2″ Concrete-Tight Malleable Iron Set Screw Coupling joins two unthreaded rigid or IMC conduits for a long-lasting fit.