Panel Hole Plugs | McMaster-Carr

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3,831 Products

Building and Machinery Hardware

Protective Plugs

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

1,010 products

Protective Caps

Protect just about anything, including pipe, flanges, screws, and posts

1,045 products

Grommets

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

941 products

Vibration-Damping Mounts

Attach to machinery to reduce vibration and noise and extend service life

93 products

Electrical

Electrical Enclosure Plugs

Block or seal holes in outlet boxes and enclosures to keep out debris, dust, and moisture

77 products

Heat-Shrink Tubing End Caps

Seal moisture out of crimped electrical connections

4 products

Heat-Shrink Tubing

Apply heat to seal and insulate electrical wiring and connections

3 products

DIN Rail Caps

Guard the edges of DIN rail from damage and create a finished look

2 products

Circuit Breaker Box Filler Plates

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

2 products

Capacitor Boots

Shield capacitors and wire connections to extend their service life and reduce accidental shocks

3 products

Fabricating and Machining

Fixture Plate Plugs

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

1 product

Fastening and Joining

Retaining Rings

Hold components on a shaft

25 products

Quick-Release Pin Receptacles

Secure quick-release pins when you don’t have a through hole

35 products

Standoff Caps

Create a finished look on standoffs and protect them from dirt and debris

66 products

Quick-Release Pin Retaining Caps

Hold quick-release pins in holes that are oversized or out of round

23 products

Fluid Handling

Expansion Plugs

Seal pipe and tubing lines when checking for leaks

236 products

Hose and Hose Fittings

Flexible and stronger than tubing; often used to convey liquids and gases under pressure

196 products

Containers, Storage, and Furniture

Dust Covers

Stretch over drums, pails, and other objects to keep out dust and debris

6 products

Facility and Grounds Maintenance

Rebar Caps

Brightly colored to alert workers to exposed rebar and pipe

4 products

Heating, Ventilation, and Air Conditioning

Air Conditioner Service Valve Caps

Seal off AC service valves to prevent refrigerant from leaking out

2 products