AGS Grease Fittings are used in many multi-purpose automotive applications. Plated to resist corrosion. Fittings are hardened and supplied with ball check (except drive-type). Maximum pressure: 10,000 psi (Drive-Type is 1000 psi). AGS brass and steel fittings are comprised of Tube Nuts, Unions (Couplers), Adapters, Elbows, Tees, Bushings, Connectors, Grease, etc… AGS fittings are held to the strictest standards to perform flawlessly in their intended applications. Fittings are offered in a variety of packaging options, including: retail clam-shells, bulk boxed, and plastic tray assortments.