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The MERIT BRASS K414-0806 is a threaded pipe bushing designed to reduce a 1/2-inch male NPT connection down to a 3/8-inch female NPT port. Constructed from 304 stainless steel with a Schedule 40 wall, this bushing is rated to 150 psi and meets ISO standards. It is a compact, hex-style reducer fitting used in fluid and gas piping systems where a size transition is needed between threaded pipe runs. Plumbers, pipefitters, and industrial maintenance techs install this type of fitting in both commercial and light industrial applications where corrosion resistance is a priority.
This bushing suits residential and commercial plumbing, instrumentation lines, compressed air systems, and process piping where stainless steel is specified for corrosion resistance or sanitary requirements. The MNPT x FNPT thread configuration allows direct installation into a female-threaded port or pipe fitting without additional adapters. It is compatible with standard NPT-threaded pipe assemblies in Schedule 40 configurations.
Designed as an OEM-style threaded reducer bushing for use with standard 1/2-inch and 3/8-inch NPT pipe and fittings in Schedule 40 stainless steel piping systems.
Installation is performed by licensed plumbers or qualified pipefitters following applicable IPC and IFGC code requirements for threaded connections. Shut off and depressurize the line before disassembly or installation. Apply thread sealant tape or pipe dope rated for the service fluid to the male threads before making up the joint. Do not over-tighten stainless steel fittings, as galling on the threads can cause joint failure.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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