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Three-inch threadless steel conduit coupling, zinc-plated finish

L.H. DOTTIE

L.H. DOTTIE NTC300 conduit fitting coupling 3 in threadless steel zinc plated

SKU CH-TR2J-W6A3W

Threadless steel coupling joins 3-inch conduit with zinc-plated corrosion resistance

  • TypeCable Management & Conduit
  • 3 in threadless coupling joins conduit quickly
  • zinc plated steel resists corrosion in damp areas
  • DOTTIE brand trusted by electricians for reliability
  • threadless design speeds installation without special tools
  • steel construction provides mechanical strength for heavy cable runs

Three-inch threadless coupling

This three-inch threadless steel coupling joins two lengths of conduit without the need for threaded ends. The zinc-plated finish protects the steel from corrosion in damp or outdoor locations. It is intended for electricians and installers who need a quick, code-compliant connection on rigid or intermediate metal conduit runs.

Replaces threaded couplings

Unlike traditional threaded couplings this fitting slides onto plain conduit ends and secures with set-screws, eliminating time spent cutting and threading pipe. The jump is worth it when a project demands faster rough-in on long straight runs or when conduit is already installed and cannot be rotated to engage threads.

Sustained mechanical load

Under continuous vibration or thermal cycling the set-screw grip maintains alignment without loosening, provided the screws are torqued to the manufacturer's specification during installation. The zinc coating resists surface rust that could otherwise weaken the joint over extended service life.

Highlights

  • 3 in threadless coupling joins conduit quickly
  • zinc plated steel resists corrosion in damp areas
  • DOTTIE brand trusted by electricians for reliability
  • threadless design speeds installation without special tools
  • steel construction provides mechanical strength for heavy cable runs

Specifications

BrandDOTTIE
TypeCable Management & Conduit

Questions about this item

What size conduit does the 300 coupling connect?

The NTC300 coupling joins two sections of 3 inch threadless steel conduit.

How is the threadless coupling secured to the conduit?

Slide each conduit end into the coupling and tighten the set screws until they bite into the steel.

Will the zinc plating need to be refreshed in damp locations?

The zinc coating resists corrosion; inspect periodically and replace the fitting if white rust appears.

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