Merit Brass 3617HD-02 Hex Plug 1/8 in 316SS Mnpt 3000 Psi

Product Description

The MERIT BRASS 3617HD-02 is a hex plug pipe fitting designed to cap and seal threaded pipe ends in fluid and gas distribution systems. Constructed from 316 and 316L stainless steel, this fitting delivers strong corrosion resistance in demanding environments including chemical processing, marine, and high-purity plumbing applications. It carries a pressure rating of 3,000 psi, making it suitable for high-pressure lines. The male NPT (MNPT) threaded end allows for direct installation into standard female NPT ports. Plumbers and pipefitters working on industrial or commercial piping systems are the primary installers of this type of fitting.

This hex plug is intended for use in pipe systems requiring a durable, corrosion-resistant closure at 1/8 inch female NPT ports. Its 316 and 316L stainless steel construction makes it well suited for applications involving moisture, mild chemicals, or sanitary requirements. Typical installation scenarios include capping unused branch outlets, test ports, and instrument taps in commercial plumbing, industrial process lines, and HVAC hydronic systems.

Key Features

• 316 and 316L stainless steel construction for strong corrosion resistance
• 3,000 psi pressure rating suitable for high-pressure service
• MNPT threaded connection for installation into standard female NPT ports
• 1/8 inch fitting size for small-diameter pipe terminations
• Hex drive head allows installation and removal with standard wrenches

Compatibility

Designed as an OEM-style replacement or new-installation hex plug for 1/8 inch female NPT threaded pipe ports in industrial, commercial, and mechanical piping systems.

Installation Notes

Installation is performed by licensed plumbers or pipefitters following applicable codes such as the International Plumbing Code (IPC) or ASME B31.3 for process piping. Depressurize and isolate the pipe section before removing or installing any threaded plug. Apply an appropriate thread sealant or PTFE tape to the male threads before tightening. Use a wrench on the hex head to achieve a secure connection without over-stressing the fitting body.