Reducing Bushing, 1-1/4″ to 3/4″, Steel Threaded Fitting
https://nsiindustries.com/product/reducing-bushing-1-1-4-to-3-4-steel-threaded-fitting/
Use the Bridgeport 1-1/4″ to 3/4″ Steel Reducing Bushing to reduce the size of internal female threads when joining two lengths of threaded rigid or IMC conduits.