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Galvanized square head pipe plug with tapered threads

Value Brand

Value Brand 1" MNPT Galvanized Square Head Plug

SKU CH-HTQR-MBNB5

Galvanised malleable-iron square-head plug with 1 in NPT threads and Class 150 rating

  • Galvanized coating resists corrosion in plumbing systems
  • Square head design allows secure wrench tightening
  • 1 inch NPT male threads fit standard pipe connections
  • Class 150 pressure rating suits typical residential applications
  • Malleable iron construction provides durable mechanical strength

1" MNPT Galvanized Square Head Plug

This Zoro Select plug seals a 1 inch male National Pipe Thread opening in malleable iron piping systems. The galvanized coating resists corrosion in water, air and inert gas lines. It is rated for Class 150 service and ships new without pre-applied sealant.

Replaces worn or missing threaded closures

Use this plug when a square head fitting is stripped, corroded or lost during maintenance. The jump is worth it when the existing port matches 1 inch MNPT and a galvanized malleable iron plug restores the pressure boundary at Class 150.

Fits standard malleable iron assemblies

The square head accepts a wrench for installation in tight pipe runs. No seal is included, so thread compound or tape must be supplied separately. California Proposition 65 warnings apply for cancer and reproductive harm.

Highlights

  • Galvanized coating resists corrosion in plumbing systems
  • Square head design allows secure wrench tightening
  • 1 inch NPT male threads fit standard pipe connections
  • Class 150 pressure rating suits typical residential applications
  • Malleable iron construction provides durable mechanical strength

Specifications

BrandZoro Select

Questions about this item

What thread size does this 1" galvanized square head plug require for a proper fit?

The plug uses a 1 inch MNPT thread that mates with a matching female NPT fitting in Class 150 piping systems.

How do I install this square head plug without damaging the threads?

Apply pipe thread sealant to the male threads, hand-tighten, then use a wrench on the square head for one to two additional turns.

Will the galvanized coating on this plug need replacement or maintenance over time?

The galvanized malleable iron resists corrosion in typical water or air lines; inspect periodically and replace if white rust or pitting appears.

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