(25) 1/2" 0.5 inch Flush Mount Black Plastic Body and Sheet Metal Hole Plugs
Why are there holes through the male part of a US electrical plug? - Quora
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Plugyourholes.com | Kansas City MO
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Black Hole plug (Dia)19mm, Pack of 10 | DIY at B&Q
Hole Plugs
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connector - Why do banana plugs need these holes? - Electrical Engineering Stack Exchange
Lee Valley Decorative Hole Plugs
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The prongs on this plug have no holes : r/mildlyinteresting
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Why Do Electrical Plugs Have Holes? - Facts.net
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