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Hexagonal malleable iron pipe cap with threaded interior

Value Brand

Value Brand Cap 1-1/4" FNPT Malleable Iron 300

SKU CH-RFPC-8A5FE

Malleable iron cap with 1-1/4 inch FNPT threads rated for 300 class service up to 550 degrees Fahrenheit

  • Rated for 300 class pressure handling
  • Operates from -20 to 550 degrees Fahrenheit
  • Malleable iron construction resists cracking
  • FNPT threads ensure secure pipe sealing
  • Prop 65 warning for chemical awareness

1-1/4" FNPT Malleable Iron Cap

This Zoro Select fitting is a Class 300 pipe cap designed for 1-1/4 inch nominal pipe size. It features female National Pipe Thread (FNPT) connections and is constructed from malleable iron. The component is rated for operating temperatures ranging from -20 degrees to 550 degrees Fahrenheit.

Suitable for high-pressure piping systems

This cap suits installers needing a Class 300 rated closure for 1-1/4" threaded iron pipe. It is not for systems requiring a pre-applied thread sealant or an included gasket seal. Buyers needing different pressure ratings, pipe diameters, or material types such as steel or plastic should select alternative fittings.

Class 300 pressure rating

The Class 300 designation defines the pressure-temperature capability of this malleable iron cap. This specification determines compatibility with the piping system's design pressure and the 550 degree Fahrenheit maximum temperature limit. Verify the system requirements match this class before installation.

How it compares

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

Price $6.99
Cheaper than about 78% of the 2,955 comparable items (median $17.99).

Specifications

Product
Brand nameZoro Select

Questions about this item

What size pipe thread does this 1-1/4" FNPT cap fit?

It fits a 1-1/4 inch nominal pipe size with FNPT threading, matching the same nominal diameter on your existing pipe or fitting.

Will the malleable iron material and Class 300 rating handle the pressure and temperature of my older steel piping system?

Malleable iron Class 300 is rated for -20 to 550 degrees F, so it will withstand the same pressure and temperature range as comparable Class 300 steel fittings already in the system.

How can I confirm the cap is sealed properly after I thread it onto the pipe?

After hand-tightening plus one to two turns with a wrench, pressurise the line and check the joint for leaks; the cap includes no pre-applied sealant, so use pipe thread compound or tape during assembly.

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