Merit Brass 3417HD-04 Hex Plug 1/4 Inch Stainless Steel Mnpt

Product Description

The MERIT BRASS 3417HD-04 is a 1/4 inch male NPT hex plug designed to close off pipe ends in fluid and gas distribution systems. Machined from 304/304L stainless steel, it delivers a pressure rating of 3000 psi, making it suitable for demanding industrial, plumbing, and mechanical piping applications. The hex head profile accepts a standard wrench for proper installation torque. Plumbers, pipefitters, and mechanical contractors use this plug to cap threaded pipe runs, isolate system sections, or seal unused branch ports during testing and service.

This plug is used in residential and commercial piping systems where a threaded closure is required on a 1/4 inch NPT male connection. Common applications include process piping, compressed air lines, hydraulic circuits, and general-purpose fluid handling. The 304/304L stainless steel construction resists corrosion in wet and mildly corrosive service environments, making it a reliable choice for both indoor mechanical rooms and outdoor exposed installations.

Key Features

• 1/4 inch MNPT threaded connection for standard NPT pipe systems
• 3000 psi pressure rating suitable for high-pressure pipe applications
• 304/304L stainless steel construction for corrosion resistance
• Hex head design allows wrench engagement for secure, leak-free installation
• Compact form factor fits tight spaces in manifolds and pipe assemblies

Compatibility

Designed as an OEM-style threaded hex plug for 1/4 inch NPT piping systems using standard 60-degree tapered thread engagement.

Installation Notes

Installation is performed by licensed plumbers or pipefitters in accordance with applicable IPC or IFGC code requirements. De-pressurize and isolate the pipe system completely before installing or removing any threaded plug. Apply an appropriate thread sealant or PTFE tape to the male threads before engagement. Do not over-tighten; use a calibrated torque wrench or controlled wrench turns per the pipe system specification.