Merit Brass K617H-04 Hex Plug 1/4 in 316 Ss Mnpt 150 Psi

Product Description

The MERIT BRASS K617H-04 is a 1/4-inch hex plug designed to close off pipe ends in threaded piping systems. Machined from 316 stainless steel, this plug offers strong resistance to corrosion and is well suited for applications involving moisture, chemicals, or harsh process environments. The male NPT (MNPT) thread profile provides a secure, leak-resistant seal when installed per standard practice. Rated at 150 psi, it meets ISO standards for dimensional consistency. Plumbers, pipefitters, and mechanical contractors install these plugs when capping unused branch outlets or temporarily or permanently closing pipe ends in fluid and gas distribution systems.

This hex plug is appropriate for use in residential and commercial plumbing, process piping, and industrial fluid systems where stainless steel is specified for corrosion resistance or sanitary requirements. The 1/4-inch fitting size fits common small-diameter branch connections and instrumentation ports. The hex head allows installation and removal with a standard wrench, making it practical for both permanent installations and service work that may require future access.

Key Features

• 316 stainless steel construction for corrosion resistance in wet or chemical environments
• MNPT threaded end connection for compatibility with standard NPT female fittings
• 150 psi pressure rating suitable for low- to moderate-pressure piping systems
• Hex head design enables torque application with a standard open-end or box wrench
• Meets ISO dimensional standards for consistent thread fit and interchangeability

Compatibility

Designed as an OEM-style replacement or service fitting for standard 1/4-inch MNPT threaded pipe connections in plumbing and industrial piping systems.

Installation Notes

Installation is performed by licensed plumbers or qualified pipefitters in accordance with applicable plumbing codes such as the IPC. Shut off and depressurize the system fully before installing or removing any threaded plug. Apply an appropriate thread sealant or PTFE tape to the male threads before installation. Do not over-torque, as this may crack fittings or damage female threads in softer materials.