Adapter 9/16-18X1/2 MORFSXMNPT ADPT

Adapter, Connection Size 1: 1/4-in, Connection Type 1: Male O-Ring Face Seal, Connection Size 2: 1/2-in, Connection Type 2: Male NPTF, Steel, Thread Size 1: 9/16-18, Thread Size 2: 1/2-14, 1.5-in L