Knockout Plugs | McMaster-Carr

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System of Measurement

Knockout Trade Size

Material

Stainless Steel

Knockout Diameter

7/8" to 1 9/32"

1 3/8" to 1 3/4"

ID

Head Diameter

Environment

Food and Beverage

Shape

Color

Panel Thickness

0.016" to 0.062"

0.016" to 0.063"

0.016" to 0.125"

0.016" to 0.25"

Pipe Size

Finish

Enclosure Rating

Attachment Type

Thread Type

Thread Size

Hole Diameter

For Push-Button Hole Size

For Use With

Push-Button Holes

REACH

RoHS

Overall Height

DFARS Specialty Metals

Export Control Classification Number (ECCN)

Width

Performance

Chemical Resistant

Corrosion Resistant

Impact Resistant

How can we improve?

335 Products

Electrical Enclosure Plugs

Knockout Plugs for Enclosures

Knockout Plugs for Enclosures

Guard electrical components from debris and pesky critters

Watertight Knockout Plugs for Enclosures

Watertight Knockout Plugs for Enclosures

Don't let water sneak into unused conduit knockouts

Watertight Push-Button Plugs for Enclosures

Watertight Push-Button Plugs for Enclosures

Seal unused push-button switch holes so water won't sneak in

Threaded Plugs for Enclosures

Threaded Plugs for Enclosures

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

Watertight Threaded Plugs for Enclosures

Watertight Threaded Plugs for Enclosures

Screw into unused threaded holes to block out water

Sanitary Threaded Plugs for Enclosures

Sanitary Threaded Plugs for Enclosures

Super smooth with round edges to prevent bacteria buildup

Watertight Square Plugs for Enclosures

Watertight Square Plugs for Enclosures

Seal unused square holes on the bottom of enclosures to block out water

Other Products

Protective Plugs

Protective Plugs

Insert into holes in pipe, containers, panels, and parts to keep out debris

Circuit Breaker Box Filler Plates

Circuit Breaker Box Filler Plates

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

Electrical Connector Caps

Electrical Connector Caps

Protect data connectors when not in use

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)