This Tru-Flate 22-123 hose fitting is a reusable air line fitting for connecting supply line hoses to a plug, air tool, or other air operated machinery. It is made of brass for resistance to corrosion. It has a 1/4" barbed end for connecting to a hose and a 1/4" inch male National Pipe Thread (NPT) threaded connection for connecting to a plug or tool with a female National Pipe Thread (NPT) threaded connection. It is precision machined for a longer life and better performance and does not require a hose clamp or ferrules. This reusable hose fitting is suitable for use with compressed air lines. Tube fittings are components used for connecting, branching, terminating, and changing the direction of tubing in pneumatic and hydraulic systems. They are made of brass, stainless steel, PBT (polybutylene terephthalate), and other materials that resist corrosion and wear. Tube fittings have various types of connections, including threaded, welded, barbed, and push-to-connect (also called one-touch). Push-to-connect connections do not require tools or sealants. Tube fittings are used in various applications, including machine tools, airplane and truck controls, and automated production lines, among others.Plews & Edelmann manufactures automotive and pneumatic hose, lines, reels, accessories, fittings, and lubricants under the Edelmann, Amflo, Omega, LubriMatic, and UltraLube brands. The company, founded in 1909, is headquartered in Dixon, IL.