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3 inch galvanized steel square head plug with male NPT threads

Anvil

Anvil 319902649 3" Galvanized Square Head Plug

SKU CH-9PMJ-X554E

A 3-inch galvanized steel square-head plug with male NPT threads rated for 300 psi at 150 °F and 150 psi at 350 °F steam

  • 300 psi at 150 °F maximum operating pressure
  • 150 psi at 350 °F maximum steam pressure
  • Galvanized steel resists corrosion in water systems
  • Male NPT threads fit standard 3 inch pipe
  • Service range from -20 °F to 350 °F

3-inch Galvanized Square Head Plug

The Anvil 319902649 is a 3-inch nominal pipe size plug made of galvanized steel for Class 150 service. It carries male NPT threads and is rated for 300 psi at 150 degrees F and 150 psi at 350 degrees F saturated steam. The solid construction suits water, oil, air and steam lines in commercial and industrial piping systems.

Galvanized Steel Build and Male NPT Threads

The galvanized coating resists corrosion in damp or outdoor installations while the square head provides a positive wrench grip for installation and removal. Male NPT threads create a tapered seal when tightened with thread compound or tape. No pre-applied sealant or gasket is included so the installer chooses the sealing method appropriate to the medium.

Replaces Worn or Damaged Threaded Plugs

This plug replaces an existing 3-inch Class 150 square head plug that leaks, corrodes or has damaged threads. The jump is worth it when system pressure reaches the 300 psi rating or when steam service demands the 150 psi at 350 degrees F limit. It does not suit applications requiring a higher pressure class or a different thread standard.

Highlights

  • 300 psi at 150 °F maximum operating pressure
  • 150 psi at 350 °F maximum steam pressure
  • Galvanized steel resists corrosion in water systems
  • Male NPT threads fit standard 3 inch pipe
  • Service range from -20 °F to 350 °F

Specifications

BrandANVIL

Questions about this item

What is the maximum operating pressure for the 3" MNPT Galvanized Square Head Plug?

The plug handles 300 psi at 150 degrees F maximum operating pressure and 150 psi at 350 degrees F max steam pressure.

What thread standard and size does this plug require for a proper fit?

It uses a 3 inch Male NPT thread, so it fits a matching 3 inch Female NPT fitting.

How should the square head plug be installed to avoid leaks?

Apply pipe thread sealant or tape to the Male NPT threads before tightening the square head with a wrench.

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