Nylon Knockout Seals for Thicker Panels plug electrical knockouts. They are molded in gray color to resemble galvanized steel, and come in 6 trade sizes fit 1/2" to 2" knockout holes for panels up to 1/4" thick.
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Item #

Item Name

Head Diameter

Mounting Hole Diameter

Overall Height

20300114-A07I N/A HEYCO® 1.375 Inch (in) Mounting Hole Diameter Nylon Knockout Seal for Thicker Panel N/A 1.500 in38.10 mm N/A 1.375 in34.90 mm N/A 0.562 in14.30 mm
20300470-A070 N/A HEYCO® 0.875 Inch (in) Mounting Hole Diameter Nylon Knockout Seal for Thicker Panel N/A 1.015 in25.80 mm N/A 0.875 in22.20 mm N/A 0.562 in14.30 mm
20300471-A070 N/A HEYCO® 1.093 Inch (in) Mounting Hole Diameter Nylon Knockout Seal for Thicker Panel N/A 1.218 in31.00 mm N/A 1.093 in27.80 mm N/A 0.562 in14.30 mm
20300472-A070 N/A HEYCO® 1.750 Inch (in) Mounting Hole Diameter Nylon Knockout Seal for Thicker Panel N/A 1.906 in48.40 mm N/A 1.750 in44.50 mm N/A 0.562 in14.30 mm
20300473-A070 N/A HEYCO® 2.000 Inch (in) Mounting Hole Diameter Nylon Knockout Seal for Thicker Panel N/A 2.140 in54.40 mm N/A 2.000 in50.80 mm N/A 0.579 in14.70 mm
20300697-A070 N/A HEYCO® 2.500 Inch (in) Mounting Hole Diameter Nylon Knockout Seal for Thicker Panel N/A 2.730 in69.30 mm N/A 2.500 in63.50 mm N/A 0.750 in19.10 mm
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