SEPCO 539M Steel Conduit Penny, 4-Inch Knockout Closure

SEPCO 539M Steel Conduit Penny, 4-Inch Knockout Closure

The SEPCO 539M Steel Conduit Penny is a 4-Inch steel disc engineered to close off and seal unused conduit knockout openings in electrical boxes, panels, cabinets, and other enclosures. Formed from solid steel, this conduit penny drops into a matching 4-Inch knockout and provides a flush, finished closure once a knockout will not be put into service. Electricians rely on conduit pennies like the SEPCO 539M to keep an installation neat, keep unused openings covered, and avoid leaving open holes in a box or enclosure wall after layout changes. It is a straightforward, purpose-built piece of hardware for finishing out electrical boxes and panels, and a small accessory worth keeping on hand on any electrical truck or in any panel shop for change orders, layout revisions, and box or enclosure modifications.

Key Features

• Trade Size: Sized for a 4-Inch conduit knockout, matching standard 4-Inch knockout openings in boxes and enclosures.
• Durable Steel Construction: Made from solid steel for a rigid, long-lasting closure that resists everyday job-site handling.
• Knockout Sealing Function: Serves as a penny/plug that permanently closes an unused conduit knockout opening.
• Flush, Finished Fit: Delivers a clean, finished appearance on the box or enclosure surface where a knockout is not being used.
• Simple, Fast Installation: Seats directly into the knockout opening for quick closure without specialized tools.
• Job-Ready Hardware: A practical accessory for electricians finishing out panels, boxes, and enclosures on commercial and industrial jobs.

Technical Specifications

• Refer to manufacturer documentation for complete technical specifications.

Typical Applications

• Sealing Unused Conduit Knockouts
• Electrical Box and Panel Finishing
• Commercial and Industrial Electrical Installations
• Panelboard and Enclosure Modifications
• Renovation and New Construction Wiring
• General Electrical Maintenance and Cleanup

Why SEPCO?

SEPCO builds practical electrical hardware like the 539M Conduit Penny from solid steel for dependable, long-lasting performance in the field. This straightforward steel closure gives electricians and contractors a durable way to finish out unused 4-Inch knockouts cleanly and securely, keeping boxes and enclosures neat and properly closed. Choose SEPCO for well-made, job-ready electrical accessories built to hold up to everyday installation work, from small closures like the 539M Conduit Penny to the rest of the SEPCO electrical product line.