Panel Knockouts | McMaster-Carr

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Hole Diameter

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3,759 Products

Fabricating and Machining

Hole Punches

Punch holes in metal, plastic, and fabric

Punch Pins

Use with press dies to punch 1/8" and larger holes; modify to fit your application

Hole Saws

Connect to a drill or drill press to make circular cuts

Hole Saw Pilots

Hole Saw Pilots

Center your hole saw when enlarging existing holes

Hole Flaring Dies

Hole Flaring Dies

Create flares around holes in sheet metal to make the edges stronger and more rigid

Hole Saw Arbor Extensions

Hole Saw Arbor Extensions

Reach your hole saw into spots where your drill is too big to fit

Building and Machinery Hardware

Protective Plugs

Protective Plugs

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

Grommets

Protect wire, cable, and cords from holes with sharp or rough edges

Electrical

Electrical Enclosure Plugs

Electrical Enclosure Plugs

Cover unused holes in enclosures to keep out dust, dirt, and moisture

Heat-Shrink Tubing

Heat-Shrink Tubing

Apply heat to seal and insulate electrical wiring and connections

Conduit and Conduit Fittings

Conduit and Conduit Fittings

Protect wiring from impact and the environment in runs indoors, outdoors, and underground

Electrical Receptacles

Electrical Receptacles

Install in a wall or panel to transmit power or data to plugs or sockets

Electrical Sockets

Electrical Sockets

Pair with plugs or receptacles to transmit power or data

Electrical Plugs

Electrical Plugs

Pair with sockets or receptacles to transmit power or data

Electrical Connector Caps

Electrical Connector Caps

Protect data connectors when not in use

Circuit Breaker Box Filler Plates

Circuit Breaker Box Filler Plates

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

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