Merit Brass K417H-48 Hex Plug 3 in 304 Ss Mnpt 150 Psi

Product Description

The MERIT BRASS K417H-48 is a 3-inch hex plug designed to close off threaded pipe ends in fluid and gas piping systems. Constructed from 304 stainless steel, it offers reliable corrosion resistance for demanding commercial and industrial applications. The male NPT (MNPT) threaded connection conforms to ISO standards and carries a pressure rating of 150 psi. At 1-25/32 inches in length and 2.51 pounds, this plug is a solid, full-bodied fitting suited for permanent or temporary pipe termination. Licensed plumbers and pipefitters commonly install this type of plug during system commissioning, maintenance shutdowns, or dead-end branch isolation.

This hex plug is appropriate for residential, commercial, and light industrial piping installations where a threaded pipe end requires a secure, pressure-rated closure. The 3-inch fitting size is commonly found in main supply lines, equipment branch connections, and manifold assemblies. The 304 stainless steel construction makes it well suited for applications involving moisture, mild chemicals, or environments where carbon steel fittings are prone to corrosion. A standard pipe wrench or hex-drive tool is used for installation to ensure proper thread engagement.

Key Features

• 3-inch MNPT threaded connection for direct engagement with female NPT pipe threads
• 304 stainless steel construction provides corrosion resistance in wet and chemically active environments
• 150 psi pressure rating suitable for standard service piping applications
• ISO-conforming thread standards ensure dimensional compatibility with compliant fittings
• Hex head design allows full torque application with a standard pipe wrench or socket tool
• Compact 1-25/32-inch body length minimizes protrusion in tight installations

Compatibility

Designed as an OEM-style threaded pipe plug for use with 3-inch female NPT pipe ends in standard 150-class threaded piping systems.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable plumbing codes such as the IPC or applicable local standards. Depressurize and drain the piping system completely before removing or installing any threaded plug. Apply an appropriate thread sealant or PTFE tape to the male threads before installation to ensure a leak-free seal. Do not over-torque, as excess force can crack or distort the fitting body or damage mating threads.