Parker 218P-4 Hex Plug 1/4 Inch Mnptf Brass

Product Description

The PARKER 218P-4 is a brass hex plug designed to close off open pipe ports in industrial fluid and pneumatic systems. Threaded with a 1/4 inch male MNPTF connection, this fitting seats with a tapered thread seal rated to 1000 psi maximum working pressure. It operates across a wide temperature range of -65 degrees F to 250 degrees F, making it suitable for demanding service environments. Installed using a standard hex wrench or socket, the 218P-4 is a go-to dead-end plug for technicians working in plumbing, hydraulic, pneumatic, and general industrial piping applications.

This hex plug is used to cap unused ports on manifolds, valves, pumps, compressors, and distribution blocks in both commercial and industrial installations. Its compact brass construction fits standard 1/4 inch pipe threads found throughout fluid power and process piping systems. The MNPTF tapered thread design provides a pressure-tight mechanical seal without requiring additional sealant in most applications, though thread sealant tape is commonly applied per system requirements.

Key Features

• 1/4 inch male MNPTF tapered thread for a reliable pressure-tight seal
• 1000 psi maximum working pressure rating
• Wide temperature range: -65 degrees F to 250 degrees F
• Brass construction offers corrosion resistance in fluid and air service
• Hex drive head allows installation with standard wrenches or sockets
• Meets SAE J530 and SAE J531 standards

Compatibility

Designed as an OEM-style replacement or service fitting for industrial piping systems using 1/4 inch MNPTF threaded ports. Compatible with systems rated within the 1000 psi and 250 degrees F working limits.

Installation Notes

Installation is performed by plumbers, pipefitters, or hydraulic technicians. Always depressurize and isolate the system before removing or installing pipe plugs. Apply thread sealant tape or compound as required by the system specifications and applicable codes. Do not overtighten brass fittings, as this can crack the hex body or damage mating threads.