Merit Brass 3417HD-02 Hex Pipe Plug 1/8 in Mnpt Ss

Product Description

The MERIT BRASS 3417HD-02 is a hex pipe plug designed for closing off 1/8 inch MNPT threaded pipe ends in pressurized fluid and gas systems. Machined from 304/304L stainless steel, this plug delivers corrosion resistance suitable for demanding service environments. It carries a pressure rating of 3,000 psi, making it appropriate for high-pressure piping applications. Plumbers, pipefitters, and mechanical contractors install this type of fitting when capping unused ports on manifolds, valves, strainers, and inline components during system assembly or maintenance.

This hex plug fits 1/8 inch MNPT threaded connections and is suited for use in residential and commercial plumbing, HVAC hydronic systems, compressed air lines, and industrial process piping where stainless steel material compatibility is required. The hex head allows standard wrench engagement for proper thread engagement without special tooling. It is sold individually, with a minimum order quantity of 6 pieces per order.

Key Features

• 304/304L stainless steel construction for corrosion resistance in wet and chemical-exposure environments
• 3,000 psi pressure rating suitable for high-pressure service
• 1/8 inch MNPT threaded end for standard pipe thread connections
• Hex head design allows wrench engagement for secure installation and removal
• Threaded connection type — no soldering, brazing, or special fittings required

Compatibility

Designed as an OEM-style replacement and general-service hex plug for 1/8 inch MNPT threaded pipe connections in plumbing, HVAC, and industrial piping systems.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable IPC and IFGC codes for the intended service fluid. Depressurize and isolate the system before installing or removing any threaded plug. Apply thread sealant or PTFE tape appropriate for the service media to the male threads before engagement. Do not overtighten — use a wrench on the hex head only and avoid applying torque to adjacent piping or valves.