Parker 211P-4 Square Head Pipe Plug 1/4 in Mnptf

Product Description

The PARKER 211P-4 is a square head pipe plug with a 1/4 inch male MNPTF thread, designed to seal open ports and unused fittings in fluid and pneumatic piping systems. Rated to 1000 psi maximum working pressure and suitable for temperatures ranging from -65 degrees F to 250 degrees F, this plug meets SAE J530 and SAE J531 standards. It is installed by plumbers, pipefitters, and industrial maintenance technicians wherever a threaded port needs to be capped off cleanly and securely. The square head drive allows for positive wrench engagement during installation and removal.

This plug is suited for use in hydraulic lines, pneumatic systems, fuel delivery plumbing, and general industrial pipe assemblies where an MNPTF threaded closure is required. Its pressure rating makes it appropriate for moderate- to high-pressure service in both stationary and mobile equipment applications. Typical install scenarios include capping test ports, sealing tee branches, and blanking unused manifold ports during system commissioning or repair.

Key Features

• 1/4 inch MNPTF male thread for standard tapered pipe port sealing
• 1000 psi maximum working pressure rating
• Operating temperature range: -65 degrees F to 250 degrees F
• Square head design provides positive wrench engagement
• Meets SAE J530 and SAE J531 standards

Compatibility

Designed as a standard MNPTF square head pipe plug for use in any piping system or hydraulic or pneumatic assembly with a 1/4 inch female NPT or NPTF threaded port.

Installation Notes

Installation is performed by licensed plumbers, pipefitters, or qualified maintenance technicians. Before installing or removing any pipe plug, depressurize and isolate the system completely. Apply thread sealant or PTFE tape as appropriate for the fluid service and system requirements. Use a properly sized wrench on the square head; do not use pliers or adjustable grips that may damage the head or surrounding fittings.