[1/2 Air Hose Fittings] This Chicago fitting is designed for use with 1/2 inch nominal pipe threads (NPT) for standard air hose sizes. Note: NPT thread is a nominal pipe size and does not represent the actual diameter. [1/2 Air Hose Fittings] The 1/2-inch air hose fitting can be used in a variety of applications, such as connecting oil tubing, steam pipes, water pipes, and mechanical pipes. It is also suitable for pneumatic equipment, the automotive industry, air compressors, and mechanical engineering, allowing quick connection and disconnection of various pneumatic tools and accessories. [1/2 Lug Universal Coupling] To prevent the coupling from detaching under pressure, which could lead to leaks and other issues, each 1/2 inch Chicago air fitting is equipped with a locking mechanism and rubber gasket that securely insert into the coupling's keyhole. [High-Quality] The 1/2 inch Chicago air fitting is made of high-quality carbon steel material with a galvanized finish. It is recommended for use at a maximum working pressure of less than 150 PSI to extend service life. [Easy Installation] The installation of the 1/2 inch Chicago air hose fitting requires no additional couplings and no grease or oil for sealing, resulting in a cleaner and more efficient connection. Please note: Slight color variations may occur due to lighting and display differences; this does not affect functionality. Color: As Shown In Photo Material: Carbon Steel Package Contents: 1 x Air Hose Fitting Replacement Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the actual item. Measurement may vary by +/- 1-3 cm.