Abb hk402 Compression Coupling 3/4 Inch Rigid Imc Conduit

Product Description

The ABB hk402 is a 3/4-inch malleable iron compression coupling designed for joining rigid metal conduit (RMC) and intermediate metal conduit (IMC) runs. Zinc plating provides corrosion resistance in typical indoor and sheltered outdoor raceway installations. The compression-style connection delivers a secure, vibration-resistant fit without requiring threading tools on site. At 1.969 inches in length, the hk402 is a compact fitting suited for tight raceway layouts. Licensed electricians and conduit installers use this fitting in commercial and industrial wiring systems where a reliable mechanical connection between conduit sections is required.

This compression coupling is intended for use with 3/4-inch rigid metal conduit and IMC in raceway systems. It is well suited for commercial construction, industrial facilities, and infrastructure projects where steel conduit is the specified wiring method. The fitting is listed under UL E23018, making it appropriate for installations subject to NEC inspection and approval. It is not designed for use with electrical metallic tubing (EMT), which requires a different coupling style.

Key Features

• Malleable iron construction with zinc plating for corrosion resistance
• Compression-style connection — no threading required at the fitting
• Compatible with both rigid metal conduit and IMC
• UL E23018 listed for code-compliant installations
• Compact 1.969-inch length for use in space-constrained raceways

Compatibility

Designed for use with 3/4-inch rigid metal conduit (RMC) and intermediate metal conduit (IMC).

Installation Notes

Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and applicable local codes. De-energize all circuits in the conduit run before making or breaking any connections. Ensure conduit ends are reamed and free of burrs before seating into the coupling to achieve a proper compression fit. Do not use this fitting as a substitute for a threaded rigid conduit coupling.

Technical Specifications

• Trade Size: 3/4 inches
• Length: 1.969 inches
• Material: Malleable Iron
• Finish: Zinc Plated
• Connection Type: Compression
• Conduit Type: Rigid Metal Conduit (RMC) / IMC
• Standard: UL E23018

Standard Information

• Brand: ABB
• Manufacturer Part Number: hk402