Hose fittings and pneumatic tubing fittings are used to fasten hose and tubing to assemblies or ports. Hose fittings also prevent leaks. They come in many forms, such as male or female threaded fittings, barbed fittings, and push-in fittings. Hose fittings are commonly made of corrosion-resistant brass or steel and are used with air or water hoses. Pneumatic tubing fittings prevent leaks and maintain pressure throughout a pneumatic system. They also come in different forms like compression-nut and barbed assemblies. Pneumatic tubing fittings typically connect and disconnect quickly from tubes and ports.