Keep your electrical boxes, enclosures, and panels safe, compliant, and securely closed with the professional-grade nVent GARDNER BENDER KO710 Metal Knockout Seal. Purpose-built for residential, commercial, and industrial applications, these premium metal seals offer an unyielding, code-compliant solution for blocking open or unused knockout holes in your electrical hardware. This specific model is expertly designed to accommodate a 4-in. conduit size configuration. Rugged Materials Built for Longevity Engineered to withstand harsh environments, this knockout seal is made of rust-proofed, cold-rolled galvanized steel that resists corrosion, weathering, and mechanical stress. Constructed from sturdy 16-gauge steel and featuring a robust 3/8-in. thread, it delivers maximum defense against dust, debris, and external elements. To prevent stripping, binding, or rusting over decades of service, both the included screw and bar are zinc-plated, ensuring smooth fastening and uncompromised structural integrity. Effortless Self-Centering and Placement Save time and minimize frustration during busy panel build-outs. The KO710 features an advanced alignment shape that is embossed for quick self-centering in unused knockouts. This guarantees an immediate, perfectly balanced seal across the entire opening. For unmatched flexibility, the design ensures that just one screw holds seal in place, allowing you to easily complete your installation from either the inside or the outside of the electrical box depending on clearance limits. Clear Identification and Sizing Eliminate errors and speed up inventory management in crowded job sites or workshops. Each component is clearly marked for size and catalog number for easy installation, so technicians can instantly select the perfect part for the application. Choose nVent GARDNER BENDER for time-tested electrical hardware that delivers a professional, heavy-duty finish to every project.

• SELF-CENTERING DESIGN - Embossed for quick self-centering in unused knockouts. This structural detail ensures a perfectly aligned, flush installation every time, completely eliminating guesswork and reducing labor time on the job site.
• ONE-SCREW INSTALLATION - One screw holds seal in place securely, making it exceptionally fast and easy to mount from either the inside or outside of the box. Minimizes hardware hassle while ensuring a permanent, reliable fit.
• PREMIUM STEEL BUILD - Made of rust-proofed, cold-rolled galvanized steel to deliver exceptional durability and long-lasting protection. Built from heavy-duty 16-gauge steel with a 3/8-in. thread to withstand demanding environmental conditions.
• ZINC-PLATED HARDWARE - The included tightening screw and bar are zinc-plated for enhanced corrosion resistance. Marked for size and catalog number for easy installation, ensuring contractors can quickly identify the exact part needed on the job site.
• PACKAGING NOTICE – This product may arrive with packaging labeled Gardner Bender as branding transitions to nVent GARDNER BENDER. Product design, specifications, and quality remain unchanged during this rollout.
• 16-gauge steel; 3/8" thread