Parker 219P-6 Hollow Hex Plug 3/8 Inch Mnptf Brass

Product Description

The PARKER 219P-6 is a hollow hex plug designed for industrial pipe systems requiring a reliable, pressure-rated threaded closure. Machined from brass with a 3/8 inch MNPTF (Male National Pipe Thread Fuel) connection, this plug seals open pipe ports while maintaining a rated working pressure of 1000 psi. The hollow hex drive allows installation with a standard hex key or socket, making it well suited for tight-clearance applications. Licensed plumbers, pipefitters, and industrial maintenance technicians install this type of fitting where a flush or recessed plug profile is needed without sacrificing pressure integrity.

The 219P-6 is used in hydraulic, pneumatic, fuel, and general fluid-handling systems where a 3/8 inch male threaded port needs to be capped or temporarily sealed. It performs across a wide temperature range, from -65 degrees F to 250 degrees F, making it appropriate for both refrigeration-adjacent piping and moderate-heat fluid systems in commercial and industrial settings. Its brass construction resists corrosion in water, oil, and fuel service environments.

Key Features

• 1000 psi maximum working pressure for reliable port sealing under system load
• Brass construction provides corrosion resistance in water, oil, and fuel service
• 3/8 inch MNPTF thread conforms to SAE J530 and SAE J531 standards
• Operating temperature range: -65 degrees F to 250 degrees F
• Hollow hex drive enables installation in confined spaces with a hex key or socket
• Compact, low-profile design suits tight manifold and valve body applications

Compatibility

Designed as an OEM-style replacement or new-installation fitting for any 3/8 inch MNPTF-threaded pipe port in hydraulic, pneumatic, fuel, or general fluid-handling systems requiring a hollow hex plug closure.

Installation Notes

Installation should be performed by a licensed plumber or qualified pipefitter following applicable codes. Depressurize and isolate the system completely before removing or installing any threaded plug. Apply thread sealant appropriate for the fluid service — consult the system manufacturer or applicable code for sealant type. Do not overtighten; use a calibrated torque method and follow standard practices for brass fittings to avoid galling or thread damage.