Merit Brass 3617HD-04 Hex Plug 1/4 in 316SS Mnpt 3000 Psi

Product Description

The MERIT BRASS 3617HD-04 is a 1/4 inch male NPT hex plug designed to close off and seal threaded pipe ends in demanding industrial and mechanical piping systems. Machined from 316/316L stainless steel, it delivers a 3,000 psi pressure rating and strong resistance to corrosion, making it a reliable choice for systems carrying corrosive media, high-purity fluids, or operating in harsh environments. The external hex head allows for standard wrench installation. Plumbers, pipefitters, and mechanical contractors install this fitting where a durable, pressure-rated pipe termination is required.

This hex plug is suited for use in commercial and industrial plumbing, process piping, hydraulic, and instrumentation applications where a threaded pipe end must be capped or blanked off. The MNPT thread form provides a secure mechanical connection to standard female NPT ports and fittings. Its stainless steel construction makes it appropriate for food service, chemical processing, marine, and corrosive-environment installations where carbon steel or brass fittings are not acceptable.

Key Features

• 316/316L stainless steel construction for superior corrosion resistance in harsh or corrosive service environments
• 3,000 psi pressure rating suitable for high-pressure piping applications
• 1/4 inch MNPT threaded end for direct connection to standard female NPT ports
• Hex head design accepts standard wrenches for controlled, torque-assisted installation
• Compact plug profile minimizes clearance requirements in tight piping assemblies

Compatibility

Designed as an OEM-style threaded pipe plug for use with standard 1/4 inch female NPT pipe fittings, valves, and instrumentation ports in industrial and commercial piping systems.

Installation Notes

Installation should be performed by a licensed plumber or qualified pipefitter following applicable IPC and ASME piping codes. Isolate and depressurize the piping system fully before installing or removing any threaded fittings. Apply an appropriate thread sealant or PTFE tape to the MNPT threads before assembly to ensure a leak-free seal. Do not exceed the rated working pressure of the fitting or the connected system.