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Short black steel pipe nipple with threaded ends

Value Brand

Value Brand Pipe Nipple Steel 1/8" NPT 3-1/2

SKU CH-9ZRX-W7WKG

Schedule 40 steel pipe nipple with 1/8 inch NPT threads, 3-1/2 inch overall length, rated 300 psi at 150°F

  • Schedule 40 steel rated for 300 psi at 150 °F
  • 1/8 inch NPT male threads suit air, gases, oils and non-potable water
  • Electric-resistance welded construction for consistent strength
  • Black coated finish protects against corrosion in harsh environments
  • 3-1/2 inch overall length fits tight plumbing runs

Threaded steel nipple for air.

This ZORO SELECT pipe nipple is made from Schedule 40 steel with a black finish and male NPT threads on both ends. It suits compressed air, gases, non-potable water and oil lines up to the rated pressures. The welded electric-resistance construction provides a continuous metal path for standard plumbing and industrial hook-ups.

Pressure ratings and thermal limits

The fitting handles 300 psi at 150 degrees F for general service and 150 psi at 350 degrees F for steam. These limits define the safe operating envelope for the media listed. California Proposition 65 warnings apply because the product contains a chemical known to the state to cause cancer and reproductive harm.

Schedule 40 compatibility and 1/8 inch nominal size

The 1/8 inch nominal bore and 13/32 inch outside diameter match Schedule 40 pipe dimensions, so the nipple threads directly into matching couplings, valves or ports without adapters. The 3-1/2 inch overall length spans short gaps between components while keeping the assembly compact. Globally sourced manufacture ensures consistent thread quality for leak-tight joints.

Highlights

  • Schedule 40 steel rated for 300 psi at 150 °F
  • 1/8 inch NPT male threads suit air, gases, oils and non-potable water
  • Electric-resistance welded construction for consistent strength
  • Black coated finish protects against corrosion in harsh environments
  • 3-1/2 inch overall length fits tight plumbing runs

Specifications

BrandZORO SELECT

Questions about this item

How do I install the 1/8 in NPT pipe nipple without damaging the Schedule 40 steel threads?

Apply PTFE tape or pipe thread sealant to the male threads, hand-tighten into the female fitting, then turn one to two full turns with a wrench on the nipple body; avoid over-tightening which can crack the Schedule 40 fitting.

What maintenance does the black-coated steel nipple need in an air or oil system?

Inspect the black finish periodically for rust or coating damage; replace the nipple if corrosion appears or if threads show wear, as the steel material is not stainless and the coating is the primary protection.

At what pressure will the 300 psi rating become the limiting factor during sustained use?

The maximum operating pressure is 300 psi at 150 degrees F for air, gases, non-potable water and oils; sustained operation above this pressure or temperature will exceed the Schedule 40 steel nipple's rated limit.

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