Gardner Bender 703 Knockout Seal 1 Inch Steel 25 Pack

Product Description

The GARDNER BENDER 703 is a steel knockout seal designed to close unused conduit knockouts in electrical enclosures, junction boxes, and panel boxes. This fitting installs into standard 1-inch knockout openings to prevent contaminants, pests, and moisture from entering an enclosure when a conduit run is no longer needed or was never populated. Electricians and maintenance technicians install this seal as part of routine panel work or enclosure maintenance. Each package contains 25 seals, making it a practical choice for service vehicles and job-site stock. The steel construction provides durability consistent with metal enclosure applications.

The 703 knockout seal is suited for residential and light commercial electrical work wherever 1-inch conduit knockouts are left open. Common applications include load centers, sub-panels, junction boxes, pull boxes, and other metallic or non-metallic enclosures that feature standard 1-inch knockout openings. This seal is a finishing component installed after rough-in or during panel cleanup to bring an enclosure into code-compliant condition. The 25-unit pack supports multiple installations from a single purchase, reducing supply runs on larger projects.

Key Features

• Fits standard 1-inch conduit knockout openings in electrical enclosures
• Steel construction for strength and compatibility with metal enclosures
• Closes unused knockouts to block moisture, dust, and pests
• Package quantity of 25 seals supports multi-point or multi-enclosure jobs
• Compact form factor for easy storage on service vehicles

Compatibility

Designed as an OEM-style replacement knockout seal for standard 1-inch conduit knockout openings found in residential and commercial electrical enclosures, junction boxes, and panel boxes.

Installation Notes

Installation is performed by a qualified electrician. De-energize and lock out the enclosure before beginning work, in accordance with NFPA 70E safe work practices. The seal is pressed or snapped into the knockout opening by hand or with light tool pressure. Verify the finished installation fully closes the opening with no gaps, as required by NEC Article 110 for electrical enclosure integrity.