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3 inch 304 stainless steel cap with FNPT threads

Legend Valve

Legend Valve 404-130 3 inch 304 Stainless Steel Cap

SKU CH-AW8W-F0ZKG

A 3-inch 304 stainless steel FNPT cap for sealing industrial plumbing systems

  • 304 stainless steel resists corrosion for long service life
  • 3 inch FNPT threads fit standard pipe connections
  • New condition ensures clean, undamaged threads
  • Legend Valve brand backs industrial-grade reliability
  • California Proposition 65 warning included for safety compliance

Product Identity

The Legend Valve 404-130 is a 3 inch 304 stainless steel cap with female National Pipe Thread. It suits industrial plumbing systems that require corrosion-resistant closure on a three-inch line. Buyers maintaining process piping or water infrastructure will find the material appropriate for harsh environments. The component is supplied new from the manufacturer.

Upgrade Context

This cap replaces damaged or outdated closures on existing 3 inch FNPT fittings where 304 stainless steel offers better chemical resistance than carbon steel or brass alternatives. The jump is worth it when the service fluid attacks lesser alloys or when system standards mandate austenitic stainless construction. It does not serve lines that require a different thread standard, a larger bore or a welded end preparation.

Installation Checklist

Verify that the mating fitting is a 3 inch male NPT thread before ordering. Confirm the system pressure and temperature fall within the rating for a 304 stainless steel threaded cap. Ensure thread sealant or tape compatible with stainless steel is available for assembly. California Proposition 65 warnings apply to this product.

Highlights

  • 304 stainless steel resists corrosion for long service life
  • 3 inch FNPT threads fit standard pipe connections
  • New condition ensures clean, undamaged threads
  • Legend Valve brand backs industrial-grade reliability
  • California Proposition 65 warning included for safety compliance

Specifications

BrandLEGEND VALVE

Questions about this item

Does the 3-inch FNPT thread on the 404-130 cap match standard Schedule 40 stainless pipe?

The 404-130 cap uses a 3-inch FNPT thread, which is the standard taper pipe thread for Schedule 40 stainless piping; verify the male pipe end is clean and undamaged before threading.

What sealant should I use when installing the 304 stainless cap, and which step is most often missed?

Apply PTFE tape or pipe dope rated for stainless steel on the male threads only; the step most often missed is wiping excess sealant from the first two threads to prevent it from entering the system.

Will the 304 stainless material on this cap require replacement due to corrosion in typical water service?

Type 304 stainless resists corrosion in most potable and non-chlorinated water services; inspect annually for pitting or crevice attack, and replace only if visible degradation appears.

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