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Small galvanized square head pipe plug with male threads

Value Brand

Value Brand 1/4" MNPT Galvanized Square Head Plug

SKU CH-FQ0J-HZM90

Galvanized square head plug with 1/4 inch male NPT threads for sealing pipe ends

  • Galvanized coating resists corrosion in plumbing systems
  • Square head design allows secure wrench tightening
  • Male NPT threads ensure compatible pipe connections
  • Class 150 rating suits standard pressure applications
  • Malleable iron construction provides durable mechanical strength

1/4" MNPT Square Head Plug

This galvanised malleable-iron fitting seals a 1/4-inch male NPT port in low-pressure piping systems. It is rated to Class 150 and supplied without pre-applied thread sealant or an included gasket.

For threaded pipe closure

Installers closing off unused outlets on water, air or inert-gas lines will find the square head allows positive wrench engagement. The fitting is not intended for flanged connections, high-temperature steam service or systems requiring an integrated sealing washer.

Class 150 pressure rating

The Class 150 designation defines the maximum allowable working pressure for this plug. Verify that the system design pressure falls within this rating before installation.

How it compares

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

Price $1.74
Cheaper than about 95% of the 2,955 comparable items (median $17.99).

Specifications

Product
Brand nameZORO SELECT

Questions about this item

Does the galvanized coating on this Class 150 plug wear off and require re-sealing over time?

The plug is galvanized malleable iron with no pre-applied thread sealant, so installers should apply their own sealant during each installation to maintain a leak-free joint.

What pressure limit does the Class 150 rating impose on this 1/4 inch NPT plug during continuous service?

Class 150 designates a maximum working pressure of 150 psi for non-shock service at ambient temperature, which is the first limit reached under sustained use.

How much heat does the malleable iron body transfer when hot water or steam runs through the line all day?

Malleable iron conducts heat readily, so the plug will assume the fluid temperature; insulate the surrounding pipe if surface heat is a concern.

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