Merit Brass XNL117A-04 Square Head Plug 1/4 Inch Mnpt

Product Description

The MERIT BRASS XNL117A-04 is a solid square head pipe plug rated at 125 lb, designed to close off pipe ends and fittings in low-pressure plumbing, HVAC, and general piping systems. The plug features a male NPT (MNPT) threaded end in a 1/4 inch nominal size, allowing it to thread directly into female-threaded fittings, valves, and equipment ports. Constructed from solid brass with a rough finish, it provides reliable sealing performance in a range of fluid handling applications. Plumbers, HVAC technicians, and pipefitters install these plugs when blanking off unused ports or capping lines during service and installation work.

This square head plug is suited for residential and light commercial piping systems where a 1/4 inch MNPT closure is required. Common applications include capping gauge ports, unused tee outlets, and service access points on water lines, gas distribution systems, and HVAC equipment piping. The square drive head allows for tightening and removal with a standard open-end or adjustable wrench without the need for specialty tools.

Key Features

• Solid brass construction provides corrosion resistance in wet piping environments
• 125 lb pressure class rated for low-to-medium pressure service
• 1/4 inch nominal MNPT thread for direct engagement into standard female NPT fittings
• Square head drive allows wrench tightening without specialty tools
• Rough finish suitable for general commercial and residential piping applications

Compatibility

Designed as an OEM-style replacement or service fitting for standard 1/4 inch female NPT threaded ports in residential and commercial plumbing, HVAC, and general piping assemblies.

Installation Notes

Installation is performed by licensed plumbers or HVAC technicians in accordance with applicable local plumbing codes and IFGC requirements where gas service is involved. Shut off system pressure and depressurize the line before installing or removing any pipe plug. Apply thread sealant tape or compound rated for the service fluid to the MNPT threads before installation. Do not overtighten brass fittings, as brass threads can be damaged by excessive torque.

Technical Specifications

• Nominal Size: 1/4 inch
• End Style: Male NPT (MNPT)
• Pressure Rating: 125 lb
• Material: Brass
• Finish: Rough
• Head Style: Square

Standard Information

• Brand: MERIT BRASS
• Manufacturer Part Number: XNL117A-04