Parker Hannifin 5406C-16 Hydraulic Cap And Plug Set

The Parker Hannifin 5406C-16 / 5406P-16 Hydraulic Cap and Plug Set is designed to seal unused hydraulic ports and threaded connections in fluid power systems, offering temporary or permanent protection against fluid leakage and contamination during operation, maintenance, transport, or storage. This 5-pair kit uses 1 in NPT ports with a 1 in female NPT cap and a 1 in male NPT plug, and it features standard NPT threads for reliable compatibility with pumps, valves, cylinders, manifolds, and hydraulic hoses. Made from steel, the threaded cap-and-matching plug configuration is suited for hydraulic oil and industrial fluids across construction, agriculture, manufacturing, and mining environments. Common installations include hydraulic power units, mobile equipment, and industrial machinery, where keeping dirt, moisture, and debris out of ports is essential to maintain system cleanliness and reliability. The set is intended for port sealing and contamination protection in hydraulic and fluid power systems and is compatible with a broad range of hydraulic components, ensuring straightforward field replacements when seals or caps are damaged or lost.