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One-inch square-head pipe plug in brushed 304 stainless steel

Value Brand

Value Brand 1 in MNPT 304 Stainless Steel Square Head Plug Class 3000

SKU CH-22PH-NKQ4T

A 1-inch male NPT plug in 304 stainless steel rated for 2500 psi at 350 °F steam

  • 1 in male NPT for secure pipe closure
  • 304 stainless steel resists corrosion
  • Class 3000 rating handles high pressure
  • 2500 psi steam rating at 350 °F
  • Square head allows easy wrench installation

1 in MNPT 304 Stainless Steel Plug

This 1 in MNPT square head plug is manufactured from 304 stainless steel for corrosion-resistant pipe closure. It suits plumbing and industrial maintenance professionals who need a reliable Class 3000 fitting. The male NPT threads conform to standard taper specifications for secure sealing. It is rated for 2500 psi at 350 degrees F maximum steam pressure.

Check thread size and pressure rating

Verify that your piping system uses 1 in male NPT threads before ordering this plug. Confirm the operating pressure and temperature stay within the 2500 psi at 350 degrees F steam rating. The Class 3000 designation indicates the fitting pressure class for proper system matching. No thread sealant or seal is included with this fitting.

Supplied without sealant or seal

This plug ships without pre-applied thread sealant or an included seal, so the installer must provide compatible sealing material. Applying the correct tape or compound ensures a leak-free joint on the stainless threads. The bare metal finish allows the fitter to choose a sealant suited to the specific fluid and temperature. This keeps the fitting compatible with diverse media.

Highlights

  • 1 in male NPT for secure pipe closure
  • 304 stainless steel resists corrosion
  • Class 3000 rating handles high pressure
  • 2500 psi steam rating at 350 °F
  • Square head allows easy wrench installation

Specifications

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Questions about this item

What comes with the 1 in MNPT 304 stainless steel square head plug and what must be purchased separately?

The plug is supplied as a single fitting with no pre-applied thread sealant and no seal included, so thread sealant or tape must be bought separately for installation.

How do I decide between the Class 3000 rating and the 2500 psi steam limit for my system?

Class 3000 designates the fitting’s pressure class, while the 2500 psi @ 350 °F figure is the maximum steam pressure; choose based on whether your design pressure is governed by the class rating or by steam service limits.

What does the 2500 psi @ 350 °F steam rating mean when the plug is installed in a piping system?

It indicates the highest steam pressure the plug can safely contain at temperatures up to 350 °F, so the system’s operating steam pressure and temperature must stay at or below those values.

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