L H Dottie Co D40S Knockout Seal 1-1/4 Inch 3 Piece

Product Description

The L H DOTTIE CO D40S is a 3-piece knockout seal designed to close and protect 1-1/4 inch knockout openings in electrical enclosures, panels, junction boxes, and conduit bodies. When a conduit entry point is no longer needed or was punched out in error, this seal provides a code-compliant closure that keeps debris, pests, and moisture out of the enclosure interior. Electricians and electrical contractors install this type of seal as part of standard panel and box finishing work on both new construction and retrofit projects.

The D40S fits 1-1/4 inch knockout openings commonly found in residential and light commercial electrical panels, junction boxes, and metal enclosures. The 3-piece design allows the seal to be installed from one side of the knockout without full access to the opposite face, making it practical in tight or partially enclosed spaces. It is sold and priced individually.

Key Features

• Fits 1-1/4 inch knockout openings in standard electrical enclosures
• 3-piece construction allows single-side installation in confined spaces
• Closes unused knockouts for code-compliant enclosure finishing
• Helps prevent pest, debris, and moisture intrusion into panels and boxes
• Sold individually for flexible quantity purchasing

Compatibility

Designed as an OEM-style closure for 1-1/4 inch knockout openings in standard residential and commercial electrical panels, junction boxes, conduit bodies, and metal enclosures.

Installation Notes

Knockout seals are installed by licensed electricians in accordance with NEC requirements for enclosure integrity. De-energize the panel or enclosure completely before servicing any box or panel interior. The 3-piece assembly typically requires no special tools beyond hand pressure to seat properly in the knockout opening. Inspect the knockout edge for burrs before installation to ensure a flush, secure fit.