Midland Metal 240664 Straight Reducer, 3/8 in 37 deg JIC Female Flared x 1/4 in 37 deg JIC Male Flared, Steel

JIC Reducer/Expander, Connection Size 1: 3/8-in, Connection Type 1: Female JIC, Connection Size 2: 1/4-in, Connection Type 2: Male JIC, Steel, 9/16-18 x 7/16-20 Thread