Knockout Seals

Shop electrical knockout seals for closing unused conduit openings in electrical boxes, junction boxes, panels and equipment enclosures. Also known as knockout plugs or closure plugs, these fittings create a clean, secure finish after removable knockouts have been opened or left unused.

Electrical box knockout seals help prevent dust, debris and accidental contact from entering exposed enclosure openings. Their compact design supports commercial electrical work, telecommunications installations, industrial facilities, data centers and other infrastructure projects requiring organized, professionally finished wiring systems.

Knockout hole covers are useful during new construction, equipment replacement, electrical-system modifications and enclosure reconfiguration. They allow contractors and technicians to close unnecessary openings without replacing the entire box, panel or cabinet.

Explore related electrical boxes, junction boxes, box covers and electrical box accessories for complete installations. Launch 3 supplies knockout seals and electrical hardware for telecom, broadband, commercial and industrial projects.