1/2 Couplings | Male National Pipe Thread (MNPT) | Socket Weld x Threaded | Threaded x Threaded | Threaded | 1-1/4" | 1" x 1" x 1/2" | 1" x 3 | 2-1/2" x 1-1/4" | 2" x 1-1/4" | 3-1/2" - 3" x 1" | 3/8" x 1/4" | 3"