The Dixon Valve & Coupling BN22RU50 Brass Reusable Fitting is a durable hose adapter designed for low pressure air hose applications. Made from heavy duty brass construction, this reusable fitting offers a long-lasting, dependable connection and can be easily repaired when needed. This fitting features a 1/4 inch NPTF male thread x 1/4 inch hose ID and is made to fit 1/2 inch hose OD. Installation is simple: trim the hose flush, slip and twist the ferrule onto the hose, apply a drop or two of lubricant, and turn the fitting into the ferrule. As the fitting is installed, the hose expands inside the ferrule for a secure and precise fit. No skiving is necessary. Ideal for maintenance, repair, and replacement needs, the BN22RU50 is a practical solution for extending hose life in industrial, shop, and air hose service applications.