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Short black steel pipe nipple with threaded ends

Value Brand

Value Brand 5P668 Pipe Nipple Steel 3/4 NPTxNPT 11/2

SKU CH-2K33-P6PKV

Steel pipe nipple with 3/4 inch NPT threads for air, gases, non-potable water and oils up to 300 psi

  • Durable steel construction resists wear and corrosion
  • Schedule 40 rating handles 300 psi at 150°F
  • Welded electric resistance pipe ensures leak-free joints
  • Male NPT threads on both ends simplify installation
  • Suitable for air, gases, oils and non-potable water

ZORO SELECT 5P668 Steel Pipe Nipple

The ZORO SELECT 5P668 is a Schedule 40 steel pipe nipple designed for air, gases, non-potable water and oil lines. It features male NPT threads on both ends with a nominal size of 3/4 inch and an overall length of 1 1/2 inches. The welded construction uses electric resistance weld pipe with a black finish for corrosion resistance.

Replaces worn Schedule 40 threaded nipples

This nipple replaces damaged or corroded Schedule 40 steel nipples in existing piping systems. The upgrade is worth it when the current fitting shows thread wear, leakage at the joint or internal scaling that restricts flow. It matches the same pressure class and thread standard for direct interchangeability without re-piping.

Sustained pressure and temperature performance

The fitting handles a maximum operating pressure of 300 psi at 150 degrees F and a maximum steam pressure of 150 psi at 350 degrees F. These ratings apply to continuous service rather than brief spikes. The steel material and welded seam maintain structural integrity under prolonged thermal cycling and mechanical vibration in industrial plumbing applications.

Highlights

  • Durable steel construction resists wear and corrosion
  • Schedule 40 rating handles 300 psi at 150°F
  • Welded electric resistance pipe ensures leak-free joints
  • Male NPT threads on both ends simplify installation
  • Suitable for air, gases, oils and non-potable water

Specifications

BrandZORO SELECT

Questions about this item

Will this 3/4 inch NPT nipple fit my Schedule 40 steel piping?

Yes, the nipple is built to Schedule 40 dimensions with a 3/4 inch nominal size and 1 3/64 inch outside diameter for standard NPT threads.

Do I need thread sealant when installing this steel nipple, and how tight should it go?

Apply PTFE tape or pipe dope to the male NPT threads, then tighten one to two turns past hand-tight to seal without cracking the fitting.

How long before I should replace this nipple in a 300 psi air system?

Inspect annually for corrosion or thread damage; replace if you see leaks, rust pitting, or after any over-pressure event above 300 psi.

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