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Galvanized steel square-head pipe plug, three-inch MNPT thread

Legend Valve

Legend Valve 352-410 3" Galvanized Square Head Plug

SKU CH-VCA7-NPPCK

A 3-inch galvanised square-head plug with male NPT threads for sealing pipe ends

  • Galvanized coating resists corrosion for longer service life
  • Square head design allows secure wrench tightening
  • 3 inch male NPT threads fit standard pipe fittings
  • New condition ensures clean threads and full coating integrity
  • California Proposition 65 warning indicates regulated chemical content

3-Inch Galvanized Square Head Plug

The Legend Valve 352-410 is a 3-inch galvanized steel plug with a square head and male NPT threads. It is designed to seal the end of a pipe or fitting in plumbing and piping systems. This component suits installers and maintenance crews needing a durable closure for threaded connections.

Sustained Load Behavior

The galvanized coating protects the steel body from corrosion during long-term exposure to moisture and environmental elements. The solid metal construction maintains structural integrity under continuous system pressure without deformation. The square head allows repeated tightening or removal cycles without rounding off.

Installation and Common Issues

Installation requires a wrench on the square head to thread the plug into a female NPT fitting, using appropriate thread sealant for a leak-free joint. Over-tightening can damage the fitting threads or crack the plug body. The California Proposition 65 notice indicates the product contains chemicals linked to cancer and reproductive harm, requiring safe handling practices.

Highlights

  • Galvanized coating resists corrosion for longer service life
  • Square head design allows secure wrench tightening
  • 3 inch male NPT threads fit standard pipe fittings
  • New condition ensures clean threads and full coating integrity
  • California Proposition 65 warning indicates regulated chemical content

Specifications

BrandLEGEND VALVE

Questions about this item

Does the 3" galvanized square head plug generate any noise or heat during continuous plumbing use?

The plug is a passive fitting with no moving parts, so it produces no noise or heat during all-day operation.

What pipe thread must already be present for the 3" MNPT square head plug to install correctly?

A matching 3" female NPT threaded opening is required for the male NPT threads on this galvanized plug to seal properly.

Will the 352-410 galvanized plug thread into older NPT fittings already in the system?

Yes, the plug follows standard NPT threading, so it engages with existing NPT components of the same nominal size.

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