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Stop Plugs & Knock-Out Seals

Stop Plugs & Knock-Out Seals

Stop Plugs and Knockout Seals

Knockout seals for NPT, ISO Metric and PG threaded holes. Stop plugs and knockout seals are a great way to seal unwanted holes in electrical boxes and panels.

Can't find your size?  Let us know and we can usually have them ready to ship in a few days!