Merit Brass K617H-02 Hex Plug 1/8 in 316 Ss Mnpt 150 Psi

Product Description

The MERIT BRASS K617H-02 is a 1/8 inch hex plug pipe fitting machined from 316 stainless steel and designed to seal off threaded pipe ends in industrial and commercial piping systems. It connects via a male NPT (MNPT) threaded end and is rated to 150 psi working pressure. The 316 stainless steel construction offers strong resistance to corrosion and pitting, making it suitable for wet, chemical-contact, and marine-adjacent environments. Plumbers, pipefitters, and mechanical contractors reach for this fitting when capping off low-pressure branch lines, test ports, or unused tee outlets.

This hex plug is suited for residential and light commercial plumbing, process piping, and HVAC hydronic systems where a low-profile, threaded cap is required. The 1/8 inch size is commonly used on instrumentation taps, gauge ports, and small-diameter branch connections. The hex head allows standard wrench engagement for consistent torque and a leak-free thread seal when used with appropriate thread sealant or tape.

Key Features

• 316 stainless steel construction for superior corrosion resistance in wet and chemical environments
• 1/8 inch MNPT threaded connection for direct engagement with female NPT fittings and ports
• 150 psi pressure rating suitable for low-pressure piping applications
• Hex head design allows wrench tightening for a secure, leak-free seal
• ISO-compliant dimensions for consistent thread fit and interchangeability
• Compact 0.028 pound weight for easy handling and installation in tight spaces

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 1/8 inch female NPT threaded ports in residential and commercial piping systems rated to 150 psi.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local codes and the International Plumbing Code (IPC). Shut off system pressure and drain the line before removing or installing any threaded pipe fittings. Apply a suitable PTFE thread sealant tape or paste to the male threads before engagement to ensure a leak-free connection. Do not over-tighten stainless steel fittings, as galling can occur on the threads.