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Small galvanized iron square-head pipe plug with male threads

Value Brand

Value Brand 3/8" MNPT Galvanized Square Head Plug 909

SKU CH-N89T-MSEK0

A 3/8 inch male NPT galvanized square-head plug rated to Class 150 for sealing pipe ends

  • Galvanized coating resists corrosion for longer service life
  • Square head allows wrench tightening in confined spaces
  • Male NPT threads seal pipe ends reliably
  • Class 150 rating suits standard low-pressure systems
  • Malleable iron construction withstands mechanical stress

Galvanized Square Head Plug

The Value Brand 3/8" MNPT plug is a Class 150 malleable iron fitting designed for sealing threaded pipe ends in plumbing systems. Its galvanized coating provides corrosion resistance for water, air, and oil lines. The square head allows installation with a standard wrench. No pre-applied thread sealant is included.

Sustained Pressure Performance

Rated for Class 150 service, the fitting maintains its seal under continuous operating pressure within that class limit. The malleable iron construction resists deformation when tightened to specification. Galvanization protects the threads and body from rust during long-term exposure to moisture. It is intended for permanent or semi-permanent closure of a port.

Thread Standard Limits

The male NPT threads conform to the nominal pipe size standard for 3/8 inch connections. Proper sealing requires the installer to apply a compatible thread compound or tape. The product contains chemicals identified under California Proposition 65 as causing cancer and reproductive harm. It is not restricted from sale in any listed state.

Highlights

  • Galvanized coating resists corrosion for longer service life
  • Square head allows wrench tightening in confined spaces
  • Male NPT threads seal pipe ends reliably
  • Class 150 rating suits standard low-pressure systems
  • Malleable iron construction withstands mechanical stress

Specifications

BrandZORO SELECT

Questions about this item

Does the galvanized coating on this 3/8" MNPT square head plug create heat or noise during continuous plumbing use?

No, the malleable iron plug with galvanized finish is a passive fitting that generates no heat or noise during operation.

What pipe thread must my existing system have to accept this 3/8" MNPT square head plug?

Your pipe or fitting must provide a matching 3/8 inch female NPT thread for the male NPT end to seal properly.

Will this Class 150 galvanized plug work safely alongside older black iron fittings in the same line?

Yes, the Class 150 rating matches standard malleable iron fittings, so it can join older black iron components on the same NPT threads.

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