B&K 3/8-in Threaded Flare x MIP Adapter Union Fitting

For use with fuel, oil, liquefied petroleum (LP) and natural gas lines. 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.