Plugs | Male National Pipe Thread (MNPT) | Socket Weld x Threaded | Sweat x MIP | Sweat | Threaded x Threaded | Threaded | Galvanized Pipe and Fittings | 1-1/4" x 1-1/4" | 3/8" x 1/4" | 3/8" x 1/8" | 3"