B&K 3/8-in Threaded Flare x FIP Adapter Coupling Fitting

For use on fuel, oil, LP and natural gas lines and systems. Designed for use with aluminum, copper, brass and welded steel tubing that can be flared. Recommended for higher pressures than those covered by compression fittings. 5/8-18 threads. Resists mechanical pullout. No-lead product CSA certified to NSF 372, low lead content certification program – plumbing products class 6853-01.