Midland Metal 640064 Straight Connector, 3/8 in 37 deg JIC Male Flared x 1/4 in Male ORB, Steel

Adapter, Connection Size 1: 3/8 in, Connection Type 1: Male JIC, Connection Size 2: 1/4 in, Connection Type 2: Male O-Ring Boss, Steel, 9/16-18 x 7/16-20 Thread, 4500 psi, Additional Information: 4500 psi Non-Adjustable