Merit Brass 3417HD-08 Hex Plug 1/2 Inch Mnpt Stainless Steel

Product Description

The MERIT BRASS 3417HD-08 is a threaded hex plug designed for use in pipe systems requiring a reliable, pressure-rated end closure. Manufactured from 304/304L stainless steel, this fitting provides solid corrosion resistance in both wet and dry service environments. The male NPT (MNPT) thread connection seats into a female-threaded port to seal off unused pipe ends or tee branches. With a pressure rating of 3,000 psi, it is appropriate for demanding fluid and gas piping applications. The hex head allows for installation with standard hand tools. Plumbers, pipefitters, and mechanical contractors are the typical installers of this type of fitting.

The 3417HD-08 suits residential and light commercial plumbing, process piping, and industrial fluid systems where a 1/2 inch MNPT threaded closure is needed. It is commonly used to cap off branch connections, test ports, or unused outlets during system assembly or modification. The 304/304L dual-grade material makes it suitable for general-purpose corrosive service where austenitic stainless steel is specified.

Key Features

• 304/304L stainless steel construction for corrosion resistance in wet and chemical-exposure environments
• 3,000 psi pressure rating for use in demanding fluid and gas piping systems
• MNPT threaded end connection for installation into standard female NPT ports
• Hex head design accommodates standard wrenches for secure installation and removal
• 1/2 inch fitting size covers a common branch and port closure application in trade piping work

Compatibility

Designed as an OEM-style replacement and general-use threaded hex plug for standard 1/2 inch female NPT pipe ports in plumbing, HVAC, and industrial piping systems.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local codes and the International Plumbing Code (IPC). Depressurize and drain the system completely before removing or installing any threaded fittings. Apply an appropriate thread sealant or PTFE tape to the MNPT threads before installation. Do not overtighten, as this can crack female fittings or distort threads on stainless components.