Sharkbite UP526 1/2 in. x 1/2 in. Female Swivel Adapter is a 1/2-in. PEX-to-NPSM female swivel adapter used in plumbing systems to connect PEX or PE-RT tubing to a male threaded (NPSM/FPT) fitting. It's part of SharkBite's line of poly-alloy adapters designed for potable water and hydronic heating applications, offering corrosion-resistant construction and compatibility with both copper crimp rings and stainless steel clamp rings for secure connections. The swivel feature allows easier alignment and installation in tight spaces, helping reduce stress on piping during assembly. This adapter is certified for use within a wide pressure and temperature range and meets relevant industry standards for quality and performance in residential and commercial plumbing.