Anderson Metals 756115-04 Hollow Hex Plug 1/4-18 Mnpt

Product Description

The ANDERSON METALS 756115-04 is a hollow hex plug fitting machined from lead free brass for use in pipe systems carrying potable water, grease, fuels, and LP or natural gas. The male thread is sized 1/4-18 MNPT, allowing it to seat into a standard female NPT port and seal under pressures up to 1,000 psi. The hollow hex drive profile accepts a hex key for installation and removal without requiring external wrench flats, making it suitable for tight-clearance locations. Licensed plumbers, pipefitters, and HVAC-R technicians install this type of plug during system assembly, maintenance, and pressure testing procedures.

This plug is suited for residential and light commercial piping applications where a low-profile port closure is needed. Typical uses include capping unused branch ports on manifolds, gas valves, and distribution assemblies. Its lead free brass construction meets potable water requirements, making it appropriate for domestic plumbing systems in addition to fuel gas and lubrication service lines. The 1/4-18 MNPT thread is one of the most common pipe thread sizes found in trade plumbing and HVAC piping assemblies.

Key Features

• Lead free brass construction meets potable water compliance requirements
• 1/4-18 MNPT male thread seats into standard female NPT ports
• Rated to 1,000 psi maximum working pressure
• Hollow hex drive allows installation with a hex key in confined spaces
• Compatible with potable water, grease, fuels, LP gas, and natural gas service

Compatibility

Rated for use with potable water, grease, fuels, LP gas, and natural gas systems. Designed as an OEM-style replacement or new-installation plug for any piping assembly with a standard 1/4-18 female NPT port.

Installation Notes

Installation is performed by a licensed plumber, pipefitter, or qualified HVAC technician. Depressurize and isolate the system before removing or installing any pipe plug. Apply thread sealant or PTFE tape appropriate for the service fluid before threading the plug into the female port. Do not overtighten — follow applicable IPC or IFGC guidelines for NPT thread engagement.