EFC International
EFC International
1940 Craigshire St. Louis,
MO 63146-4008
Phone: 1 314.434.28881
Contact: www.efc-intl.com/contact
Website: www.efc-intl.com
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HEYCO® Standard Nylon Dome Type Hole Plugsclose unneeded chassis holes. Their convex matte finish head tapers to a thin edge. They are available in 29 sizes for use in 3/16" - 6" (4.70mm - 152.40mm) diameter holes.
HEYCO® Standard Nylon Dome Type Hole Plugs
Unit of Measure
1 2 3 

Item #

Item Name

Overall Height

Maximum Mounting Hole Size

Head Outside Diameter

20300081-A03I N/A HEYCO® 127.00 Millimeter (mm) Maximum Mounting Hole Diameter Black Standard Nylon Dome Type Hole Plug N/A 0.781 in19.80 mm N/A 5.000 in127.00 mm N/A 5.219 in132.50 mm
20300147-A01I N/A HEYCO® 63.50 Millimeter (mm) Maximum Mounting Hole Diameter White Standard Nylon Dome Type Hole Plug N/A 7.50 in19.10 mm N/A 2.500 in63.50 mm N/A 2.730 in69.50 mm
20615022-A030I N/A HEYCO® 22.20 Millimeter (mm) Maximum Mounting Hole Diameter Black Standard Nylon Dome Type Hole Plug N/A 0.453 in11.50 mm N/A 0.875 in22.20 mm N/A 1.015 in25.80 mm
20615024-A010I N/A HEYCO® 25.40 Millimeter (mm) Maximum Mounting Hole Diameter White Standard Nylon Dome Type Hole Plug N/A 0.453 in11.50 mm N/A 1.000 in25.40 mm N/A 1.203 in30.60 mm
20100045-A03 N/A HEYCO® 44.50 Millimeter (mm) Maximum Mounting Hole Diameter Black Standard Nylon Dome Type Hole Plug N/A 0.406 in10.30 mm N/A 1.750 in44.50 mm N/A 1.925 in
20100046-A03 N/A HEYCO® 50.80 Millimeter (mm) Maximum Mounting Hole Diameter Black Standard Nylon Dome Type Hole Plug N/A 0.406 in N/A 2.000 in50.80 mm N/A 2.140 in
20300081-A010 N/A HEYCO® 127.00 Millimeter (mm) Maximum Mounting Hole Diameter White Standard Nylon Dome Type Hole Plug N/A 0.781 in19.80 mm N/A 5.000 in127.00 mm N/A 5.219 in132.50 mm
20300146-A01I N/A HEYCO® 76.20 Millimeter (mm) Maximum Mounting Hole Diameter White Standard Nylon Dome Type Hole Plug N/A 7.50 in19.10 mm N/A 3.000 in76.20 mm N/A 3.171 in80.50 mm
20300163-A010 N/A HEYCO® 152.40 Millimeter (mm) Maximum Mounting Hole Diameter White Standard Nylon Dome Type Hole Plug N/A 0.781 in19.80 mm N/A 6.000 in152.40 mm N/A 6.219 in157.90 mm
20300163-A030 N/A HEYCO® 152.40 Millimeter (mm) Maximum Mounting Hole Diameter Black Standard Nylon Dome Type Hole Plug N/A 0.781 in19.80 mm N/A 6.000 in152.40 mm N/A 6.219 in157.90 mm
20615001-A030I N/A HEYCO® 4.70 Millimeter (mm) Maximum Mounting Hole Diameter Black Standard Nylon Dome Type Hole Plug N/A 0.234 in5.90 mm N/A 0.187 in4.70 mm N/A 0.250 in6.40 mm
20615002-A010I N/A HEYCO® 4.70 Millimeter (mm) Maximum Mounting Hole Diameter White Standard Nylon Dome Type Hole Plug N/A 0.234 in5.90 mm N/A 0.187 in4.70 mm N/A 0.250 in6.40 mm
20615003-A030I N/A HEYCO® 6.40 Millimeter (mm) Maximum Mounting Hole Diameter Black Standard Nylon Dome Type Hole Plug N/A 0.312 in7.90 mm N/A 0.250 in6.40 mm N/A 0.312 in7.90 mm
20615004-A010I N/A HEYCO® 6.40 Millimeter (mm) Maximum Mounting Hole Diameter White Standard Nylon Dome Type Hole Plug N/A 0.312 in7.90 mm N/A 0.250 in6.40 mm N/A 0.312 in7.90 mm
20615005-A030I N/A HEYCO® 7.90 Millimeter (mm) Maximum Mounting Hole Diameter Black Standard Nylon Dome Type Hole Plug N/A 0.312 in7.90 mm N/A 0.312 in7.90 mm N/A 0.375 in9.50 mm
20615006-A010I N/A HEYCO® 7.90 Millimeter (mm) Maximum Mounting Hole Diameter White Standard Nylon Dome Type Hole Plug N/A 0.312 in7.90 mm N/A 0.312 in7.90 mm N/A 0.375 in9.50 mm
20615007-A030I N/A HEYCO® 9.50 Millimeter (mm) Maximum Mounting Hole Diameter Black Standard Nylon Dome Type Hole Plug N/A 0.406 in10.30 mm N/A 0.375 in9.50 mm N/A 0.468 in11.90 mm
20615008-A010I N/A HEYCO® 9.50 Millimeter (mm) Maximum Mounting Hole Diameter White Standard Nylon Dome Type Hole Plug N/A 0.406 in10.30 mm N/A 0.375 in9.50 mm N/A 0.468 in11.90 mm
20615009-A030I N/A HEYCO® 11.10 Millimeter (mm) Maximum Mounting Hole Diameter Black Standard Nylon Dome Type Hole Plug N/A 0.406 in10.30 mm N/A 0.437 in11.10 mm N/A 0.531 in13.50 mm
20615010-A010I N/A HEYCO® 11.10 Millimeter (mm) Maximum Mounting Hole Diameter White Standard Nylon Dome Type Hole Plug N/A 0.406 in10.30 mm N/A 0.437 in11.10 mm N/A 0.531 in13.50 mm
20615011-A030I N/A HEYCO® 12.70 Millimeter (mm) Maximum Mounting Hole Diameter Black Standard Nylon Dome Type Hole Plug N/A 0.406 in10.30 mm N/A 0.500 in12.70 mm N/A 0.578 in14.70 mm
20615012-A010I N/A HEYCO® 12.70 Millimeter (mm) Maximum Mounting Hole Diameter White Standard Nylon Dome Type Hole Plug N/A 0.406 in10.30 mm N/A 0.500 in12.70 mm N/A 0.578 in14.70 mm
20615013-A030I N/A HEYCO® 14.30 Millimeter (mm) Maximum Mounting Hole Diameter Black Standard Nylon Dome Type Hole Plug N/A 0.406 in10.30 mm N/A 0.562 in14.30 mm N/A 0.656 in16.70 mm
20615014-A010I N/A HEYCO® 14.30 Millimeter (mm) Maximum Mounting Hole Diameter White Standard Nylon Dome Type Hole Plug N/A 0.406 in10.30 mm N/A 0.562 in14.30 mm N/A 0.656 in16.70 mm
20615015-A030I N/A HEYCO® 15.90 Millimeter (mm) Maximum Mounting Hole Diameter Black Standard Nylon Dome Type Hole Plug N/A 0.406 in10.30 mm N/A 0.625 in15.90 mm N/A 0.718 in18.20 mm
Unit of Measure
1 2 3