★Size & Material: Heavy Duty Brass,strong and durable.(Better Than Steel) Both the unions are 5/8-18 Inverted threads (regular 5/16 inch tube fitting size).
★Firm And Durable: Minimprover Brass for corrosion resistance, high temperature ductility and low magnetic permeability. Operating temperatures range from -53 to 121 degrees C (-65 to 250 degrees F).
★Fit For: Most common inverted flare/double flare sizes for 3/8 inch tube (5/8-18 Inverted threads), for use with 3/8 inch steel, poly coated, Nickel Poly Armour, Cupronickel Tubing or copper brake lines.
★Inverted flare union: These unions and nuts are the best option to join two 3/8 inch brake lines together.
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