Junction Box Plugs | McMaster-Carr

	Material Material

	System of Measurement System of Measurement

Metric

Inch

	For ID For ID

	For Knockout Trade Size For Knockout Trade Size

	Head Diameter Head Diameter

	Plug Type Plug Type


Snap In	Locking

Push In

	For Knockout Diameter For Knockout Diameter

	Color Color

	Gray		Black
	White		Off-White
	Clear

	For Panel Thickness For Panel Thickness

	Environment Environment

	Thread Type Thread Type

NPT

Metric

	Pipe Size Pipe Size

	For Maximum Panel Thickness For Maximum Panel Thickness

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

	Environmental Rating Environmental Rating

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Thread Size Thread Size

	Overall Height Overall Height

	Specifications Met Specifications Met

CSA

UL 94

FDA Compliant

	Hardness Hardness

	Finish Finish

Zinc Plated

Nickel Plated

Powder Coated

	Head Height Head Height

332 Products

Hole Plugs for Enclosures

Snap-In Hole Plugs

Seal unused holes and knockouts in enclosures and outlet boxes.

Threaded Hole Plugs

Close off unused threaded holes.

Self-Centering Hole Plugs

A circular groove quickly centers plug in unused holes and knockouts.

Threaded Submersible Hole Plugs

Close off unused threaded holes.

Submersible Hole Plugs

Sanitary Threaded Hole Plugs

FDA compliant for use near food, these plugs close off unused holes in equipment such as electrical enclosures to keep out debris and water.

Corrosion-Resistant Washdown
Hole Plugs for Push-Button Holes

Sized for 22 mm and 30 mm push-button holes.

Corrosion-Resistant Washdown
Hole Plugs for Square Holes

Close 2" square holes in the floor of your enclosure with these adhesive plugs.

Corrosion-Resistant Washdown Hole Plugs

Sized for knockouts and conduit openings.

Washdown Hole Plugs

Sized for knockouts and conduit openings.

Washdown Hole Plugs for Push-Button Holes

Sized for 22 mm and 30 mm push-button holes.

Panel Plugs

Metal Snap-In Panel Plugs

Made of steel, these are our most durable plugs for panels. Tapered prongs snap into the hole to securely hold them in place.

Metal Snap-In Panel Plug Assortments

Keep metal snap-in plugs of various sizes on hand to solve whatever problems arise. Made of steel, these plugs are our most durable plugs for panels. Their tapered prongs snap into holes to securely hold them in place.

Plastic Snap-In Panel Plugs

Tapered prongs or a snap-in ring securely hold these plugs in place.

Vented Snap-In Panel Plugs

Vents in the top allow air circulation and permit heat and fumes to escape. These plugs have tapered prongs that snap into the hole to securely hold them in place.

Locking Panel Plugs

The wings on these plugs expand against the sides of a hole to lock them in place.

Clear Locking Panel Plugs

These plugs are see-through to provide visibility and light transmission. They have wings that expand against the sides of the hole to lock them in place.

Vented Locking Panel Plugs

Vents in the top allow air circulation and permit heat and fumes to escape. All of these plugs have wings that expand against the sides of the hole to lock them in place.

Push-In Panel Plugs

Push these plugs into place for a finished appearance on both sides of a panel.

Sealing Panel Plugs

The wings on these plugs expand against the sides of a hole to form a liquid-tight seal. Pierce the plugs with round wire, cable, or tubing and they function as a grommet to create insulated holes.

Filler Plates for Circuit Breaker Boxes

Conceal live electrical components in circuit breaker boxes to prevent injury and damage.

Hole Plugs for Enclosures

Snap-In Hole Plugs

Threaded Hole Plugs

Self-Centering Hole Plugs

Threaded Submersible Hole Plugs

Submersible Hole Plugs

Sanitary Threaded Hole Plugs

Corrosion-Resistant WashdownHole Plugs for Push-Button Holes

Corrosion-Resistant WashdownHole Plugs for Square Holes

Corrosion-Resistant Washdown Hole Plugs

Washdown Hole Plugs

Washdown Hole Plugs for Push-Button Holes

Panel Plugs

Metal Snap-In Panel Plugs

Metal Snap-In Panel Plug Assortments

Plastic Snap-In Panel Plugs

Vented Snap-In Panel Plugs

Locking Panel Plugs

Clear Locking Panel Plugs

Vented Locking Panel Plugs

Push-In Panel Plugs

Sealing Panel Plugs

Filler Plates for Circuit Breaker Boxes

Filler Plates for Circuit Breaker Boxes

Corrosion-Resistant Washdown
Hole Plugs for Push-Button Holes

Corrosion-Resistant Washdown
Hole Plugs for Square Holes