Eaton 3151X2 Square Head Pipe Plug 1/8 Inch Mnptf

Product Description

The EATON 3151X2 is a square head pipe plug with a 1/8 inch male MNPTF thread, rated for a maximum working pressure of 1200 psi and a temperature range of -65 degrees F to 250 degrees F. It installs into female MNPTF-threaded ports to seal off pipe and fitting ends in hydraulic, pneumatic, and fluid system applications. The straight fitting shape and square drive head allow standard wrenches to apply proper torque. At 0.56 inches overall length and 0.01 pounds, this plug is a compact, lightweight sealing solution suitable for a wide range of industrial service environments. Licensed plumbers, pipefitters, and hydraulic technicians are the primary installers.

This plug is used in industrial piping systems, fluid power assemblies, and hydraulic manifolds requiring a reliable threaded seal on an unused or capped port. Its 1/8 inch MNPTF thread size is common in low-flow hydraulic circuits, pneumatic control lines, and instrumentation ports. The plug is rated to meet ASA, ASME, and SAE standards, making it appropriate for both industrial maintenance and original equipment assembly work in commercial and light industrial settings.

Key Features

• 1/8 inch male MNPTF thread for direct installation into standard female MNPTF ports
• 1200 psi maximum working pressure rating
• Operating temperature range from -65 degrees F to 250 degrees F
• Square head drive allows wrench installation without slippage
• Straight fitting shape for straightforward port sealing
• Meets ASA, ASME, and SAE standards

Compatibility

Designed as an OEM-style replacement or service plug for industrial piping, hydraulic, and pneumatic systems with 1/8 inch female MNPTF-threaded ports rated to 1200 psi or lower.

Installation Notes

Installation is typically performed by licensed plumbers, pipefitters, or hydraulic technicians. Depressurize and isolate the system completely before removing or installing any threaded plug. Apply thread sealant compatible with the system fluid and pressure rating. Use a properly sized wrench on the square head to avoid rounding the drive surfaces.