Push-Button Hole Plugs | McMaster-Carr

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23 Products

For Use With

Knockouts

Block unused conduit knockouts

18 products

Push-Button Holes

Block unused holes for push-button switches

4 products

Attachment Type

Screw In

Twist in threaded holes for a tighter hold than clamp-on and snap-in plugs

1 product

Clamp On

Firmer hold than snap-in plugs but need access to inside and outside

22 products

Watertight Push-Button Plugs for Enclosures

Seal unused push-button switch holes so water won't sneak in. These plugs include a gasket that locks out moisture and dust to keep your electrical components dry and contaminant-free.

Clamp On—These plugs create a tighter hold than snap-in plugs but require access to both the inside and outside of the enclosure to install. Position the two metal plates of the plug on either side of the enclosure wall and tighten to sandwich the wall between them.

Oil-Resistant Powder-Coated Steel—The coating creates a barrier against water, mild detergents, and oil. However, if scratched, the underlying steel may rust.

Corrosion-Resistant 304 Stainless Steel—Won't corrode from frequent washdowns and can stand up to most cleaners, detergents, and oil.

	Head Dia.	For Enclosure Rating	Certification	Specs. Met		Each
Clamp On







	Oil-Resistant Powder-Coated Steel

	22	7/8"	0.31"	1 1/4"	NEMA 13, NEMA 4, IP66	CSA Certified, UL Recognized Component	UL 508A	0000000	000000


	30	1 1/4"	0.31"	1 3/4"	NEMA 13, NEMA 4, IP66	CSA Certified, UL Recognized Component	UL 508A	0000000	00000




			Corrosion-Resistant 304 Stainless Steel

			22	7/8"	0.31"	1 1/4"	NEMA 13, NEMA 4X, IP66	CSA Certified, UL Recognized Component	UL 508A	0000000	00000


			30	1 1/4"	0.31"	1 3/4"	NEMA 13, NEMA 4X, IP66	CSA Certified, UL Recognized Component	UL 508A	0000000	00000

Watertight Knockout Plugs for Enclosures

Don't let water sneak into unused conduit knockouts. These plugs include a gasket that locks out moisture and dust to keep your electrical components dry and contaminant-free.

Oil-Resistant Powder-Coated Steel—The coating creates a barrier against water, mild detergents, and oil. However, if scratched, the underlying steel may rust.

Corrosion-Resistant 304 Stainless Steel—Won't corrode from frequent washdowns and can stand up to most cleaners, detergents, and oil.

	For Knockout
	Trade Size	Dia.	For Max. Panel Thk.	Head Dia.	For Enclosure Rating	Certification	Specs. Met		Each
Clamp On







				Oil-Resistant Powder-Coated Steel

				1/2	7/8"	0.31"	1 3/8"	NEMA 13, NEMA 4, IP66	CSA Certified, UL Recognized Component	UL 508A	0000000	000000


				3/4	1 1/16"	0.31"	1 9/16"	NEMA 13, NEMA 4, IP66	CSA Certified, UL Recognized Component	UL 508A	0000000	00000
				1	1 3/8"	0.31"	1 7/8"	NEMA 13, NEMA 4, IP66	CSA Certified, UL Recognized Component	UL 508A	0000000	00000
				1 1/4	1 11/16"	0.31"	2 3/16"	NEMA 13, NEMA 4, IP66	CSA Certified, UL Recognized Component	UL 508A	0000000	00000
				1 1/2	2"	0.31"	2 1/2"	NEMA 13, NEMA 4, IP66	CSA Certified, UL Recognized Component	UL 508A	0000000	00000
				2	2 1/2"	0.31"	3"	NEMA 13, NEMA 4, IP66	CSA Certified, UL Recognized Component	UL 508A	0000000	00000
				2 1/2	3"	0.31"	3 1/2"	NEMA 13, NEMA 4, IP66	CSA Certified, UL Recognized Component	UL 508A	0000000	00000
				3	3 5/8"	0.31"	4 1/8"	NEMA 13, NEMA 4, IP66	CSA Certified, UL Recognized Component	UL 508A	0000000	00000
				4	4 5/8"	0.31"	5 1/8"	NEMA 13, NEMA 4, IP66	CSA Certified, UL Recognized Component	UL 508A	0000000	00000




						Corrosion-Resistant 304 Stainless Steel

						1/2	7/8"	0.31"	1 3/8"	NEMA 13, NEMA 4X, IP66	CSA Certified, UL Recognized Component	UL 508A	0000000	00000


						3/4	1 1/16"	0.31"	1 9/16"	NEMA 13, NEMA 4X, IP66	CSA Certified, UL Recognized Component	UL 508A	0000000	00000
						1	1 3/8"	0.31"	1 7/8"	NEMA 13, NEMA 4X, IP66	CSA Certified, UL Recognized Component	UL 508A	0000000	00000
						1 1/4	1 11/16"	0.31"	2 3/16"	NEMA 13, NEMA 4X, IP66	CSA Certified, UL Recognized Component	UL 508A	0000000	00000
						1 1/2	2"	0.31"	2 1/2"	NEMA 13, NEMA 4X, IP66	CSA Certified, UL Recognized Component	UL 508A	0000000	00000
						2	2 1/2"	0.31"	3"	NEMA 13, NEMA 4X, IP66	CSA Certified, UL Recognized Component	UL 508A	0000000	00000
						2 1/2	3"	0.31"	3 1/2"	NEMA 13, NEMA 4X, IP66	CSA Certified, UL Recognized Component	UL 508A	0000000	000000
						3	3 5/8"	0.31"	4 1/8"	NEMA 13, NEMA 4X, IP66	CSA Certified, UL Recognized Component	UL 508A	0000000	000000
						4	4 5/8"	0.31"	5 1/8"	NEMA 13, NEMA 4X, IP66	CSA Certified, UL Recognized Component	UL 508A	0000000	000000

Sanitary Threaded Plugs for Enclosures

Super smooth with round edges that prevent bacteria buildup, these plugs are FDA compliant for food processing areas. Screw them in unused threaded holes for a more secure hold than clamp-on and snap-in plugs. These plugs include a seal that locks out moisture and dust to keep your electrical components dry and contaminant-free. Twist them in place from the outside of the enclosure and then tighten with a hex key from the inside.

Highly-Corrosion-Resistant 316L Stainless Steel—Superior to 304 stainless steel, these plugs won’t pit or weaken when exposed to harsh chemicals, including bleach and salt water.

	Head Dia., mm	For Enclosure Rating		Each
Highly-Corrosion-Resistant 316L Stainless Steel



	M10 × 1.5 mm	19.7	IP66	00000000	00000