Dome Plugs for Thicker Panels close unneeded panel holes and electrical knock-outs in panels up to 1/4" thick. They are available in 12 sizes for use in 1/2" to 2" (12.70mm - 50.80mm) diameter holes.
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Item #

Item Name

Head Diameter

Mounting Hole Diameter

Overall Height

20300454-A010 N/A HEYCO® 0.500 Inch (in) Mounting Hole Diameter Dome Plug for Thicker Panels N/A 0.578 in14.70 mm N/A 0.500 in12.70 mm N/A 0.562 in14.30 mm
20300454-A030 N/A HEYCO® 0.500 Inch (in) Mounting Hole Diameter Dome Plug for Thicker Panels N/A 0.578 in14.70 mm N/A 0.500 in12.70 mm N/A 0.562 in14.30 mm
20300455-A010 N/A HEYCO® 0.625 Inch (in) Mounting Hole Diameter Dome Plug for Thicker Panels N/A 0.718 in18.20 mm N/A 0.625 in15.90 mm N/A 0.562 in14.30 mm
20300455-A030 N/A HEYCO® 0.625 Inch (in) Mounting Hole Diameter Dome Plug for Thicker Panels N/A 0.718 in18.20 mm N/A 0.625 in15.90 mm N/A 0.562 in14.30 mm
20300456-A010 N/A HEYCO® 0.750 Inch (in) Mounting Hole Diameter Dome Plug for Thicker Panels N/A 0.921 in23.40 mm N/A 0.750 in19.10 mm N/A 0.562 in14.30 mm
20300456-A030 N/A HEYCO® 0.750 Inch (in) Mounting Hole Diameter Dome Plug for Thicker Panels N/A 0.921 in23.40 mm N/A 0.750 in19.10 mm N/A 0.562 in14.30 mm
20300457-A010 N/A HEYCO® 1.125 Inch (in) Mounting Hole Diameter Dome Plug for Thicker Panels N/A 1.218 in30.90 mm N/A 1.125 in28.60 mm N/A 0.562 in14.30 mm
20300457-A030 N/A HEYCO® 1.125 Inch (in) Mounting Hole Diameter Dome Plug for Thicker Panels N/A 1.218 in30.90 mm N/A 1.125 in28.60 mm N/A 0.562 in14.30 mm
20300458-A010 N/A HEYCO® 1.750 Inch (in) Mounting Hole Diameter Dome Plug for Thicker Panels N/A 1.906 in48.40 mm N/A 1.750 in44.50 mm N/A 0.562 in14.30 mm
20300458-A030 N/A HEYCO® 1.750 Inch (in) Mounting Hole Diameter Dome Plug for Thicker Panels N/A 1.906 in48.40 mm N/A 1.750 in44.50 mm N/A 0.562 in14.30 mm
20300459-A010 N/A HEYCO® 1.000 Inch (in) Mounting Hole Diameter Dome Plug for Thicker Panels N/A 1.203 in30.60 mm N/A 1.000 in25.40 mm N/A 0.562 in14.30 mm
20300459-A030 N/A HEYCO® 1.000 Inch (in) Mounting Hole Diameter Dome Plug for Thicker Panels N/A 1.203 in30.60 mm N/A 1.000 in25.40 mm N/A 0.562 in14.30 mm
20300460-A010 N/A HEYCO® 1.500 Inch (in) Mounting Hole Diameter Dome Plug for Thicker Panels N/A 1.671 in42.40 mm N/A 1.500 in38.10 mm N/A 0.562 in14.30 mm
20300460-A030 N/A HEYCO® 1.500 Inch (in) Mounting Hole Diameter Dome Plug for Thicker Panels N/A 1.671 in42.40 mm N/A 1.500 in38.10 mm N/A 0.562 in14.30 mm
20300461-A010 N/A HEYCO® 2.000 Inch (in) Mounting Hole Diameter Dome Plug for Thicker Panels N/A 2.170 in55.10 mm N/A 2.000 in50.80 mm N/A 0.580 in14.70 mm
20300461-A030 N/A HEYCO® 2.000 Inch (in) Mounting Hole Diameter Dome Plug for Thicker Panels N/A 2.170 in55.10 mm N/A 2.000 in50.80 mm N/A 0.580 in14.70 mm
20300462-A010 N/A HEYCO® 1.187 Inch (in) Mounting Hole Diameter Dome Plug for Thicker Panels N/A 1.312 in33.30 mm N/A 1.187 in30.10 mm N/A 0.562 in14.30 mm
20300462-A030 N/A HEYCO® 1.187 Inch (in) Mounting Hole Diameter Dome Plug for Thicker Panels N/A 1.312 in33.30 mm N/A 1.187 in30.10 mm N/A 0.562 in14.30 mm
20300463-A010 N/A HEYCO® 1.250 Inch (in) Mounting Hole Diameter Dome Plug for Thicker Panels N/A 1.375 in34.90 mm N/A 1.250 in31.70 mm N/A 0.562 in14.30 mm
20300463-A030 N/A HEYCO® 1.250 Inch (in) Mounting Hole Diameter Dome Plug for Thicker Panels N/A 1.375 in34.90 mm N/A 1.250 in31.70 mm N/A 0.562 in14.30 mm
20300464-A010 N/A HEYCO® 1.375 Inch (in) Mounting Hole Diameter Dome Plug for Thicker Panels N/A 1.500 in38.10 mm N/A 1.375 in34.90 mm N/A 0.562 in14.30 mm
20300464-A030 N/A HEYCO® 1.375 Inch (in) Mounting Hole Diameter Dome Plug for Thicker Panels N/A 1.500 in38.10 mm N/A 1.375 in34.90 mm N/A 0.562 in14.30 mm
20300695-A010 N/A HEYCO® 0.875 Inch (in) Mounting Hole Diameter Dome Plug for Thicker Panels N/A 1.015 in25.80 mm N/A 0.875 in22.20 mm N/A 0.562 in14.30 mm
20300695-A030 N/A HEYCO® 0.875 Inch (in) Mounting Hole Diameter Dome Plug for Thicker Panels N/A 1.015 in25.80 mm N/A 0.875 in22.20 mm N/A 0.562 in14.30 mm
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