Electrical knockout plugs, also called KO plugs, close unused knockout holes in electrical boxes and panels. When inserted into the correct knockout size, the prongs grip and snap into place for a secure fit, helping keep vermin and contaminants out of the box.
Stimpson Electrical Knockout Plugs are sized to industry standard knockouts, not exact hole sizes, so match the plug to the knockout size. Plugs can be made in brass, steel, or carbon steel, with zinc, nickel, or other plated finishes for corrosion protection or appearance.
Stimpson offers Electrical Knockout Plugs in six basic sizes: 1/2”, 3/4”, 1”, 1-1/4”, 1-1/2”, and 2”.
Variations for special situations are also available.
Need a variation for a special situation? Talk with a Stimpson representative or call (877) 765-0748.
