Merit Brass XNL117-12 3/4 Inch Mnpt Brass Square Head Plug

Product Description

The MERIT BRASS XNL117-12 is a cored square head plug designed for use in piping systems where a threaded closure is required. This plug features a 3/4-inch nominal MNPT (male national pipe thread) end style and is rated at 125 lb working pressure. Constructed from brass with a rough finish, it provides reliable thread engagement and corrosion resistance in a wide range of fluid and gas service applications. Plumbers, pipefitters, and mechanical contractors commonly install this type of fitting during system assembly, pressure testing, and maintenance procedures.

This plug is suited for residential and light commercial plumbing, hydronic heating, and compressed air systems where a 3/4-inch threaded port requires capping or isolation. The cored design allows for future tapping or connection if system modifications are needed. It is a standard import-grade fitting appropriate for general-purpose service within its rated pressure class.

Key Features

• 3/4-inch nominal MNPT thread for direct engagement into female-threaded fittings and ports
• 125 lb pressure rating suitable for general-purpose plumbing and mechanical piping
• Brass construction offers corrosion resistance and durability in wet service
• Cored head design allows future tapping or modification without removing the fitting
• Rough finish provides consistent thread contact and sealant adhesion
• Square head drive style accepts standard pipe wrenches and open-end wrenches

Compatibility

Designed as an OEM-style replacement and standard service fitting for 3/4-inch MNPT female-threaded ports in brass, iron, and bronze piping systems rated at 125 lb class.

Installation Notes

Installation is performed by licensed plumbers or pipefitters. Shut off system pressure and drain the line before removing or installing any threaded plug. Apply an appropriate pipe thread sealant or PTFE tape to the male threads before installation. Tighten using a pipe wrench to seat the plug fully without over-torquing the fitting body.

Technical Specifications

• Nominal Size: 3/4 inch
• End Style: MNPT
• Pressure Rating: 125 lb
• Material: Brass
• Finish: Rough
• Head Style: Square Cored
• Origin: Import

Standard Information

• Brand: MERIT BRASS
• Manufacturer Part Number: XNL117-12