Reducing Bushing, 1″ to 1/2″, Steel Threaded Fitting
https://testing.nsiindustries.com/product/reducing-bushing-1-to-1-2-steel-threaded-fitting/
Use the Bridgeport 1″ to 1/2″ Steel Reducing Bushing to reduce the size of internal female threads when joining two lengths of threaded rigid or IMC conduits.