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Hex locknut trap, black malleable iron, three-inch NPT

Anvil

Anvil 0318913803 3 In NPT Hex Locknut Trap

SKU CH-F6PN-722RT MPN 0318913803

A 3-inch NPT hex locknut in black malleable iron for low-pressure plumbing systems carrying air, water, natural gas or steam

  • TypeDrain Components
  • 3 In NPT thread fits standard drain pipes
  • Black malleable iron resists corrosion in wet systems
  • Hex locknut design allows secure hand tightening
  • Suitable for air, water, gas and steam lines

3 Inch NPT Hex Locknut

This Anvil drain component is a black malleable iron hex locknut with a 3 inch NPT thread. It suits low-pressure plumbing installations carrying air, water, natural gas or steam. The fitting provides a secure mechanical joint for pipework in residential or light commercial systems. Installers use it where a reliable threaded connection is required.

Threaded connection for pipework

The locknut mates with a matching 3 inch NPT threaded pipe or fitting to complete the assembly. It requires a wrench engaging the hex flats for proper tightening. The malleable iron construction withstands the pressures found in the listed service media. Buyers needing a different thread size or a non-NPT standard cannot use this part.

Highlights

  • 3 In NPT thread fits standard drain pipes
  • Black malleable iron resists corrosion in wet systems
  • Hex locknut design allows secure hand tightening
  • Suitable for air, water, gas and steam lines

Specifications

TypeDrain Components
BrandAnvil
Model0318913803

Questions about this item

What is the thread size and type on the Anvil 0318913803 hex locknut?

The locknut uses a 3-inch NPT thread for low-pressure plumbing connections.

How does the black malleable iron construction handle heat during continuous steam service?

Black malleable iron resists thermal cycling in low-pressure steam lines without deforming.

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