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Hexagonal malleable iron bushing, dark metal finish, threaded ends

Value Brand

Value Brand 5P519 Hex Bushing 1-1/4" x 1/2" FNPT x MNPT coupling

SKU CH-E0SS-5DBXJ

Hex bushing reduces a 1-1/4" female NPT port to a 1/2" male NPT thread, made from Class 150 malleable iron for plumbing connections

  • Malleable iron construction rated Class 150 for durable plumbing connections
  • Hex bushing reduces 1-1/4" FNPT to 1/2" FNPT for flexible pipe sizing
  • NPT threading with 11 and 14 threads per inch ensures secure sealing
  • Zoro Select brand delivers reliable fitting performance for professional installations
  • New condition guarantees factory-fresh component ready for immediate use

Hex Bushing for NPT pipe reduction

The ZORO SELECT 5P519 hex bushing is a malleable iron fitting rated Class 150. It connects a 1-1/4 inch female NPT thread with 11-1/2 threads per inch to a 1/2 inch female NPT thread with 14 threads per inch. Plumbers and maintenance technicians use it to reduce pipe sizes in water, air or oil lines.

Behaviour under sustained pressure

Malleable iron construction resists cracking when the system cycles between pressure and vacuum. Class 150 rating defines the maximum non-shock working pressure at ambient temperature. The hex profile allows a wrench to apply high torque without rounding the corners during installation or removal.

Limits of the NPT interface

Tapered NPT threads seal by metal-to-metal contact and require sealant or tape on every joint. The 11-1/2 and 14 thread pitches are not interchangeable with straight threads or other standards. Over-tightening can split the female port, so the joint must stop at the recommended engagement depth.

Highlights

  • Malleable iron construction rated Class 150 for durable plumbing connections
  • Hex bushing reduces 1-1/4" FNPT to 1/2" FNPT for flexible pipe sizing
  • NPT threading with 11 and 14 threads per inch ensures secure sealing
  • Zoro Select brand delivers reliable fitting performance for professional installations
  • New condition guarantees factory-fresh component ready for immediate use

Specifications

BrandZORO SELECT

Questions about this item

Does the Class 150 malleable iron hex bushing run hot or make noise when used continuously in a water line?

The fitting is a passive malleable iron component with no moving parts, so it generates no heat or noise during continuous operation.

What existing pipework must I already have for the 1-1/4" FNPT and 1/2" MNPT ends to connect directly?

You need a 1-1/4" male NPT threaded opening and a 1/2" female NPT threaded opening to join without extra adapters.

Will the 150-class hex bushing mate reliably with older NPT pipe threads already in my system?

Yes, both ends use standard NPT threads so it will engage with existing NPT pipework of the same nominal sizes.

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