Electrical Knockout Plugs | McMaster-Carr

Filter by

System of Measurement

Knockout Trade Size

ID

Material

Knockout Diameter

Plug Connection Method

Head Diameter

Panel Thickness

Shape

Environment

Color

Pipe Size

Thread Size

Finish

Hole Diameter

Thread Type

Enclosure Rating

REACH

RoHS

For Use With

Export Control Classification Number (ECCN)

Overall Height

DFARS Specialty Metals

Attachment Type

Maximum Temperature

For Push-Button Hole Size

How can we improve?

334 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.)