Merit Brass XNL117A-06 Square Head Plug 3/8 Inch Mnpt

Product Description

The MERIT BRASS XNL117A-06 is a solid square head pipe plug with a 3/8 inch male NPT (MNPT) end style, rated at 125 lb. Machined from brass with a rough finish, this plug is designed to seal threaded pipe openings in low- to medium-pressure plumbing and fluid-handling systems. The square head drive profile allows easy installation and removal with a standard wrench. Plumbers, pipefitters, and mechanical contractors use this type of plug to cap off unused branch connections, test ports, and pipe ends during system assembly or maintenance.

This plug is suited for residential and light commercial plumbing, hydronic heating, compressed air, and general fluid system applications where a brass MNPT fitting is required. The 3/8 inch nominal size fits standard 3/8 inch NPT female threaded ports and fittings. The 125 lb pressure class makes it appropriate for low-pressure service lines and potable water systems where brass fittings are permitted by local code.

Key Features

• Solid brass construction provides corrosion resistance in water and fluid service
• 3/8 inch MNPT thread for direct installation into female NPT ports
• 125 lb pressure rating suitable for low- to medium-pressure plumbing service
• Square head drive allows installation and removal with a standard open-end or box wrench
• Rough finish — compatible with pipe thread sealant or PTFE tape for leak-free sealing

Compatibility

Designed as a standard MNPT pipe plug for use in any 3/8 inch female NPT threaded fitting or port in brass-compatible plumbing and fluid systems.

Installation Notes

Installation is performed by licensed plumbers or pipefitters in accordance with applicable local plumbing codes. Shut off system pressure and drain the line before removing or installing pipe plugs. Apply PTFE tape or an approved pipe thread sealant to the male threads before installation to ensure a leak-free seal. Do not overtighten — use a wrench to snug the plug firmly without stressing the receiving fitting.

Technical Specifications

• Nominal Size: 3/8 inch
• End Style: MNPT (Male National Pipe Thread)
• Pressure Rating: 125 lb
• Material: Brass
• Finish: Rough
• Head Style: Square

Standard Information

• Brand: MERIT BRASS
• Manufacturer Part Number: XNL117A-06