Parker SM Series nipples are suitable for creating a watertight seal when connected with threaded fittings, valves or equipment in various industrial and commercial applications. These nipples feature poppet valves with captive seals to reduce seal washout under pressure. They are compatible with SM Series couplers for quick connection / disconnections in hydraulic applications with fluid lines having high pressures rated up to 6000 PSI. They are made of steel for rigidity and resistance to corrosion in tough environments and are available in 3, 12, and 28 gal/min flow rates.