Merit Brass 3617DA-06 Square Head Plug 3/8 in 316 Ss Mnpt

Product Description

The MERIT BRASS 3617DA-06 is a square head pipe plug rated for 3,000 psi service, machined from 316/316L stainless steel. It is designed to seal MNPT threaded pipe openings in pressurized fluid and gas systems. The male NPT thread provides a reliable mechanical seal when installed into a female-threaded port or fitting. The square head profile accepts a standard wrench for installation and removal without the risk of slipping that occurs with recessed-drive plugs. Plumbers, pipefitters, and industrial maintenance technicians typically install this fitting in process piping, instrumentation, and utility systems where corrosion resistance is required.

This plug is suited for residential and commercial plumbing, industrial process piping, and instrumentation applications where a durable, corrosion-resistant pipe closure is needed. The 316/316L stainless steel alloy provides strong resistance to chloride environments and a wide range of chemicals, making it appropriate for marine, food service, chemical processing, and general industrial installations. The 3/8 inch MNPT thread size fits standard pipe fittings and valves at that port size.

Key Features

• 316/316L stainless steel construction for corrosion resistance in harsh or chloride-heavy environments
• 3,000 psi pressure rating suitable for high-pressure piping applications
• 3/8 inch MNPT threaded end connection for direct installation into female NPT ports
• Square head drive allows secure wrench engagement during installation and removal
• Compact, low-profile design for use in tight pipe arrangements

Compatibility

Designed as an OEM-style replacement or new-installation pipe plug for 3/8 inch female NPT threaded ports in pressurized piping systems.

Installation Notes

Installation is performed by licensed plumbers or qualified pipefitters in accordance with applicable plumbing and piping codes such as the IPC or ASME B31.3. Depressurize and drain the system fully before removing or installing any threaded plug. Apply an appropriate thread sealant or PTFE tape to the male threads prior to installation. Do not overtighten; use a wrench on the square head only and avoid applying force to adjacent fittings or pipe walls.