Merit Brass K617A-04 Square Head Pipe Plug 1/4 in 316 Ss

Product Description

The MERIT BRASS K617A-04 is a square head pipe plug designed to seal threaded pipe ends in industrial and commercial piping systems. Machined from 316 stainless steel, this plug offers strong resistance to corrosion and is well-suited for demanding fluid and gas containment applications. The male NPT (MNPT) threaded connection provides a secure, leak-resistant fit into standard NPT female-threaded ports and fittings. Rated to 150 psi, it meets ISO standards for pipe fittings. This plug is installed by plumbers, pipefitters, and HVAC technicians wherever a durable, corrosion-resistant pipe seal is required.

This square head plug is suited for use in residential and commercial plumbing, HVAC hydronic systems, industrial piping, and process equipment where a threaded pipe end must be capped or blanked off. The square head drive allows for wrench engagement without the need for specialized tooling, making field installation and removal straightforward. Its 316 stainless steel construction makes it a preferred choice in corrosive environments, including those with exposure to moisture, mild chemicals, or salt air.

Key Features

• 316 stainless steel construction for superior corrosion resistance in harsh environments
• 1/4 inch MNPT threaded connection for standard NPT female fittings
• Square head drive for easy wrench or socket engagement during installation and removal
• 150 psi pressure rating suitable for a broad range of piping applications
• Meets ISO standards for threaded pipe fittings

Compatibility

Designed as an OEM-style replacement or new-installation fitting for standard 1/4 inch female NPT threaded ports in industrial, commercial, and residential piping systems.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable codes such as the IPC or IFGC. Depressurize and drain the affected pipe section before removing or installing any threaded fitting. Apply an appropriate thread sealant or PTFE tape to the male threads before installation. Do not overtighten, as this can crack fittings or damage female thread seats.