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Galvanized steel square head pipe plug with male NPT threads

Anvil

Anvil 2-1/2" MNPT Galvanized Square Head Plug 319902607

SKU CH-FPJG-A90VV

Galvanized steel square-head plug with 2-1/2" male NPT threads rated for 300 psi at 150 °F

  • Galvanized steel resists corrosion in water systems
  • 316 stainless steel construction adds chemical durability
  • Male NPT threads seal tapered pipe connections
  • 300 psi rating handles high-pressure service at 150 °F
  • 150 psi steam rating suits 350 °F applications

2-1/2" Galvanized Steel Pipe Plug

This Anvil fitting seals the end of a 2-1/2 inch male NPT pipe thread. It is manufactured from 316 stainless steel with a galvanized finish for corrosion resistance. The solid square head allows installation with a standard wrench. Rated for 300 psi at 150 degrees F and 150 psi saturated steam at 350 degrees F.

Suits high-pressure water, oil, or steam lines

Installers closing a 2-1/2 inch NPT port on valves, tanks, or piping manifolds will find the correct thread form and pressure class here. The fitting is not intended for systems exceeding 300 psi at 150 degrees F or 150 psi steam at 350 degrees F. Buyers needing a plugged port with an integrated seal or pre-applied thread sealant must select a different component.

Class 150 pressure rating governs safe use

The galvanized steel body carries a maximum operating pressure of 300 psi at 150 degrees F and a maximum steam pressure of 150 psi at 350 degrees F. Operating temperature range spans -20 to 350 degrees F. Exceeding these limits risks leakage or fitting failure.

How it compares

Measured against everything we stock in Hose Fittings, Adapters & Clamps, at today’s prices. Recalculated every night.

Price $28.99
Pricier than about 67% of the 2,955 comparable items (median $17.99).

Specifications

Product
Brand nameANVIL

Questions about this item

Will the galvanized coating on the 2-1/2" MNPT plug need replacement if used at the 300 psi rating?

The galvanized steel body is solid with no coating maintenance required; the plug handles 300 psi at 150 °F and 150 psi at 350 °F steam without degradation.

What pressure or temperature limit will be reached first during continuous steam service at 350 °F?

The 150 psi steam rating at 350 °F is the limiting factor; the 300 psi water rating only applies at the lower 150 °F temperature.

Does the solid 316 stainless plug generate noticeable heat or noise when installed in a pressurized line?

As a static threaded fitting with no moving parts, it produces no noise and negligible heat beyond the fluid temperature inside the pipe.

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