Appleton 29-350 Malleable Steel Conduit Coupling 3-1/2 in

Product Description

The APPLETON 29-350 is a 3-1/2 inch malleable steel conduit coupling designed for joining sections of rigid metal conduit in electrical installations. Built from malleable steel with a standard set-screw or threaded connection profile, this coupling provides a secure, low-resistance mechanical and electrical bond between conduit runs. At 3.8 pounds, it is a solid, durable fitting suited for demanding commercial, industrial, and heavy-duty residential wiring applications. Licensed electricians and electrical contractors install this type of fitting as part of compliant conduit systems where mechanical protection of conductors is required.

This coupling is appropriate for use in rigid metal conduit systems in both interior and exterior electrical installations, including industrial plants, commercial buildings, and infrastructure projects where conduit integrity and grounding continuity are critical. It fits standard 3-1/2 inch rigid conduit trade size and is installed by electricians working under NEC requirements for conduit assembly and grounding. The fitting is well-suited for applications where vibration resistance and mechanical strength are priorities.

Key Features

• 3-1/2 inch trade size fits standard rigid metal conduit of the same diameter
• Malleable steel construction provides impact resistance and durability in industrial environments
• Compact profile at approximately 6.1 x 6.1 x 5.5 inches overall package dimensions
• Solid 3.8-pound build supports reliable mechanical and electrical continuity across conduit joints
• Suitable for commercial and industrial conduit systems requiring robust fittings

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 3-1/2 inch rigid metal conduit systems in commercial and industrial electrical applications.

Installation Notes

Installation should be performed by a licensed electrician in accordance with applicable NEC articles governing rigid metal conduit assembly and equipment grounding. De-energize the circuit and lock out the panel before working on any conduit system. Ensure conduit ends are reamed and free of burrs before threading or seating the coupling to prevent conductor insulation damage. Do not overtighten threaded connections to the point of deforming the fitting.

Technical Specifications

• Trade Size: 3-1/2 inches
• Material: Malleable Steel
• Weight: 3.8 pounds
• Dimensions (L x W x H): 6.1 x 6.1 x 5.5 inches
• UPC: 78312672740

Standard Information

• Brand: APPLETON
• Manufacturer Part Number: 29-350