Steel Hole Plugs | McMaster-Carr

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	Material Material	Show

Steel

	Material Material	Hide

	System of Measurement System of Measurement

Inch

	For ID For ID

	Finish Finish

	For Knockout Trade Size For Knockout Trade Size

	For Shape For Shape


Round	Square

	Plug Type Plug Type


Snap In	Push In

Screw In

	Head Diameter Head Diameter

	For Knockout Diameter For Knockout Diameter

	For Panel Thickness For Panel Thickness

	Environment Environment

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

RoHS Compliant

RoHS Compliant with
Exemptions

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

DFARS Specialty Metals
COTS-Exempt

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

REACH Compliant

	Overall Height Overall Height

	Head Height Head Height

	Environmental Rating Environmental Rating

IP66

NEMA 4

NEMA 13

	Hardness Hardness

Rockwell B30

Rockwell B70

	Color Color

	Gray

	Thread Size Thread Size

	For Maximum Panel Thickness For Maximum Panel Thickness

1/16"

1/8"

0.31"

	Container Type Container Type

Plastic Box

Metal Box

	Drive Style Drive Style

Slotted

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158 Products

Caps and 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.

Metal Square Plugs

More durable than plastic plugs, these provide the most protection from abrasion and impact. Use them to eliminate sharp edges and create a finished look on metal fence and machine-guard posts. Drive them in place with a hammer for a secure fit.

Expansion Plugs for Castings

Also known as freeze plugs, these are commonly used to permanently seal the shallow holes left in a component during the casting process.

Fixture Plate Chip Plugs

Keep chips and shavings from clogging or damaging unused holes on fixture plates in milling machines.

Metal Round Caps

More durable than plastic caps, these provide the most protection from abrasion and impact.

Threaded Standoff Caps

Give open-ended standoffs a finished look and protect them from dirt and debris.

Stacking Caps and Targets

Weld these caps and targets to the ends of posts to create stackable shelving and racking systems.

Hole Plugs for Enclosures

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.

Self-Centering Hole Plugs

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

Snap-In Hole Plugs

Seal unused holes and knockouts in enclosures and outlet boxes.