The Hydraulax Hydraulax 1-1/4" NPTF Hex Head Plug 5406P-20 is designed for dependable hydraulic connections. Part Number: 5406P-20. It is Blocks off ports to prevent fluid leakage, Useful during repairs or testing, Suitable for maintenance shutdowns and test isolations, Threaded design for quick insertion, and Used in industrial, agricultural, and service settings.