These Thicker-Panel Glossy Nylon Dome Plugs close unneeded chassis holes and electrical knockouts. Their smooth, glossy head provides easy glide. They are available in 11 sizes for use in 1/2" - 2" (12.70mm - 50.80mm) diameter holes, in 1/4" (6.40mm) thick panels.
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Item #

Item Name

Mounting Hole Diameter

Overall Height

Head Outside Diameter

20300219-A030 N/A HEYCO® 30.20 Millimeter (mm) Mounting Hole Diameter Glossy Nylon Dome Type Hole Plug for Thicker Panels N/A 30.20 mm N/A 0.562 in14.30 mm N/A 1.312 in33.30 mm
20300136-A010 N/A HEYCO® 34.90 Millimeter (mm) Mounting Hole Diameter Glossy Nylon Dome Type Hole Plug for Thicker Panels N/A 34.90 mm N/A 0.562 in14.30 mm N/A 1.468 in37.30 mm
20300136-A03I N/A HEYCO® 34.90 Millimeter (mm) Mounting Hole Diameter Glossy Nylon Dome Type Hole Plug for Thicker Panels N/A 34.90 mm N/A 0.562 in14.30 mm N/A 1.468 in37.30 mm
20300148-A03I N/A HEYCO® 22.20 Millimeter (mm) Mounting Hole Diameter Glossy Nylon Dome Type Hole Plug for Thicker Panels N/A 22.20 mm N/A 0.562 in14.30 mm N/A 0.953 in24.20 mm
20300149-A01I N/A HEYCO® 22.20 Millimeter (mm) Mounting Hole Diameter Glossy Nylon Dome Type Hole Plug for Thicker Panels N/A 22.20 mm N/A 0.562 in14.30 mm N/A 0.953 in24.20 mm
20300157-A010 N/A HEYCO® 27.80 Millimeter (mm) Mounting Hole Diameter Glossy Nylon Dome Type Hole Plug for Thicker Panels N/A 27.80 mm N/A 0.562 in14.30 mm N/A 1.218 in30.90 mm
20300157-A03I N/A HEYCO® 27.80 Millimeter (mm) Mounting Hole Diameter Glossy Nylon Dome Type Hole Plug for Thicker Panels N/A 27.80 mm N/A 0.562 in14.30 mm N/A 1.218 in30.90 mm
20300165-A010 N/A HEYCO® 25.40 Millimeter (mm) Mounting Hole Diameter Glossy Nylon Dome Type Hole Plug for Thicker Panels N/A 25.40 mm N/A 0.562 in14.30 mm N/A 1.125 in28.60 mm
20300165-A030 N/A HEYCO® 25.40 Millimeter (mm) Mounting Hole Diameter Glossy Nylon Dome Type Hole Plug for Thicker Panels N/A 25.40 mm N/A 0.562 in14.30 mm N/A 1.125 in28.60 mm
20300214-A010 N/A HEYCO® 12.70 Millimeter (mm) Mounting Hole Diameter Glossy Nylon Dome Type Hole Plug for Thicker Panels N/A 12.70 mm N/A 0.562 in14.30 mm N/A 0.563 in14.30 mm
20300214-A030 N/A HEYCO® 12.70 Millimeter (mm) Mounting Hole Diameter Glossy Nylon Dome Type Hole Plug for Thicker Panels N/A 12.70 mm N/A 0.562 in14.30 mm N/A 0.563 in14.30 mm
20300215-A010 N/A HEYCO® 44.50 Millimeter (mm) Mounting Hole Diameter Glossy Nylon Dome Type Hole Plug for Thicker Panels N/A 44.50 mm N/A 0.562 in14.30 mm N/A 1.875 in47.60 mm
20300215-A030 N/A HEYCO® 44.50 Millimeter (mm) Mounting Hole Diameter Glossy Nylon Dome Type Hole Plug for Thicker Panels N/A 44.50 mm N/A 0.562 in14.30 mm N/A 1.875 in47.60 mm
20300216-A010 N/A HEYCO® 50.80 Millimeter (mm) Mounting Hole Diameter Glossy Nylon Dome Type Hole Plug for Thicker Panels N/A 50.80 mm N/A 0.562 in14.30 mm N/A 2.157 in54.80 mm
20300216-A030 N/A HEYCO® 50.80 Millimeter (mm) Mounting Hole Diameter Glossy Nylon Dome Type Hole Plug for Thicker Panels N/A 50.80 mm N/A 0.562 in14.30 mm N/A 2.157 in54.80 mm
20300217-A010 N/A HEYCO® 15.90 Millimeter (mm) Mounting Hole Diameter Glossy Nylon Dome Type Hole Plug for Thicker Panels N/A 15.90 mm N/A 0.562 in14.30 mm N/A 0.734 in18.60 mm
20300217-A030 N/A HEYCO® 15.90 Millimeter (mm) Mounting Hole Diameter Glossy Nylon Dome Type Hole Plug for Thicker Panels N/A 15.90 mm N/A 0.562 in14.30 mm N/A 0.734 in18.60 mm
20300218-A010 N/A HEYCO® 19.10 Millimeter (mm) Mounting Hole Diameter Glossy Nylon Dome Type Hole Plug for Thicker Panels N/A 19.10 mm N/A 0.562 in14.30 mm N/A 0.859 in21.80 mm
20300218-A030 N/A HEYCO® 19.10 Millimeter (mm) Mounting Hole Diameter Glossy Nylon Dome Type Hole Plug for Thicker Panels N/A 19.10 mm N/A 0.562 in14.30 mm N/A 0.859 in21.80 mm
20300219-A010 N/A HEYCO® 30.20 Millimeter (mm) Mounting Hole Diameter Glossy Nylon Dome Type Hole Plug for Thicker Panels N/A 30.20 mm N/A 0.562 in14.30 mm N/A 1.312 in33.30 mm
20301380-A01 N/A HEYCO® 38.10 Millimeter (mm) Mounting Hole Diameter Glossy Nylon Dome Type Hole Plug for Thicker Panels N/A 38.10 mm N/A 0.562 in14.30 mm N/A 1.620 in41.20 mm
20301380-A03 N/A HEYCO® 38.10 Millimeter (mm) Mounting Hole Diameter Glossy Nylon Dome Type Hole Plug for Thicker Panels N/A 38.10 mm N/A 0.562 in14.30 mm N/A 1.620 in41.20 mm
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