Bridgeport 1161 3/4 IN – 1/2 IN Reducing Bushing, Box of 100
https://nsiindustries.com/product/reducing-bushing-3-4-to-1-2-steel-threaded-fitting/
Use the Bridgeport 3/4″ to 1/2″ Steel Reducing Bushing to reduce the size of internal female threads when joining two lengths of threaded rigid or IMC conduits.