Merit Brass K411H-06 Pipe Half Coupling 3/8 in 304 Ss

Product Description

The MERIT BRASS K411H-06 is a 3/8 inch female NPT (FNPT) threaded pipe half coupling machined from 304 stainless steel. A half coupling provides a single female threaded end for connecting a pipe to a vessel, tank wall, or pipe run where only one connection point is needed. Rated to 150 psi, it meets ISO standards and is suitable for moderate-pressure plumbing and piping applications. Licensed plumbers and pipefitters install this fitting in systems where corrosion resistance and a clean threaded joint are required.

This half coupling is used in residential and light commercial plumbing, process piping, and fluid-handling systems where 304 stainless steel is specified for corrosion resistance. It is well suited for water supply lines, compressed air systems, and general industrial piping applications that require a reliable FNPT threaded connection at 3/8 inch pipe size. The 29/32 inch length keeps the fitting compact in tight installations.

Key Features

• 304 stainless steel construction for corrosion resistance in wet and chemical-adjacent environments
• FNPT threaded end connection for standard tapered pipe thread engagement
• 150 psi pressure rating suitable for low-to-moderate pressure piping systems
• ISO-compliant fitting for compatibility with standard piping specifications
• Compact 29/32 inch length reduces footprint in tight pipe runs

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 3/8 inch NPT threaded pipe systems requiring a stainless steel half coupling.

Installation Notes

Installation should be performed by a licensed plumber or qualified pipefitter in accordance with applicable IPC and local plumbing code requirements. Depressurize and drain the line completely before removing or installing any threaded fittings. Apply an appropriate thread sealant or PTFE tape to the male threads before makeup. Do not over-tighten threaded connections, as stainless steel fittings are susceptible to galling.