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Steel conduit connector, zinc plated, set screw, 4 inch trade size

Hubbell Incorporated

Hubbell Incorporated RACO 2166 4 in Set Screw Steel Zinc Plated Coupling

SKU CH-M59W-P6M9Z

Connects 4-inch EMT, IMC, or RMC conduit using set-screw steel construction with zinc plating and insulation for concrete-tight applications

  • UL listed for code-compliant installations
  • Zinc-plated steel resists corrosion in damp locations
  • Set-screw connection secures EMT, IMC and RMC conduit
  • Insulated throat protects conductors from abrasion
  • Concrete-tight rating suits slab and wall penetrations

4-inch Set-Screw Conduit Connector

The RACO 2166 is a steel, zinc-plated connector designed to join 4-inch EMT, IMC or RMC conduit runs. Its insulated throat protects conductors during pulling and the set-screw connection provides a secure mechanical bond for commercial and industrial electrical installations. UL Listed and concrete-tight, it suits new construction and retrofit projects where a reliable raceway transition is required.

Verify conduit type and trade size before ordering

Confirm that the existing raceway is EMT, IMC or RMC with a 4-inch trade size; the connector will not fit other conduit types or diameters. The set-screw design requires sufficient access to tighten screws after the conduit is inserted, so check clearance around the joint. Because the fitting is not rain-tight, it should only be specified for dry or damp locations unless additional sealing is applied.

Steel body with zinc plating resists corrosion

The 2.43 lb connector adds minimal weight to the raceway system and its metal construction dissipates heat from conductors without creating hot spots. No moving parts or fans mean silent operation and no ongoing power draw. The insulated throat reduces abrasion on wire insulation during installation and throughout the service life of the conduit run.

Highlights

  • UL listed for code-compliant installations
  • Zinc-plated steel resists corrosion in damp locations
  • Set-screw connection secures EMT, IMC and RMC conduit
  • Insulated throat protects conductors from abrasion
  • Concrete-tight rating suits slab and wall penetrations

Specifications

BrandRACO

Questions about this item

What comes with the RACO 2166 coupling and do I need extra parts?

The coupling is a single set-screw connector for 4 in EMT, IMC or RMC conduit. No bushings, locknuts or screws are included; order those separately if your installation requires them.

How do I pick the right version of the RACO 2166 for my job?

Only one version is offered: trade size 4 in, zinc-plated steel, insulated, concrete-tight, UL Listed. Choose it when your conduit is 4 in EMT, IMC or RMC and you need a set-screw connection.

What does the 4 17/32 in overall length mean when the coupling is installed?

The installed coupling adds 4 17/32 in to the conduit run and weighs 2.43 lb. It provides a concrete-tight, insulated set-screw joint for 4 in EMT, IMC or RMC but is not rain-tight.

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