The Everbilt LFA-371 Flare Brass Adapter Union is a one-piece fitting designed for use with NSF 372 and 61 compatible brands. This straight adapter union features a 5/8 inch flare connection and 3/4 inch MIP male thread size, suitable for various applications such as oil, water pump, air conditioning, and air systems. Made of corrosion-resistant, lead-free brass, this adapter union can withstand a maximum working pressure of 150 psi and a maximum water temperature of 250 degrees Fahrenheit. With a brushed brass finish, this fitting is both practical and aesthetically pleasing for industrial plumbing and fixtures projects.