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.

WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.