Aluminum Hole Plugs | McMaster-Carr

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1,019 Products

Building and Machinery Hardware

Grommets

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

64 products

Protective Plugs

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

25 products

Protective Caps

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

32 products

Slip-On Framing Caps

Cover the rough ends of slip-on framing rails for a finished look

9 products

Fluid Handling

Bore Sealing Plugs

Permanently seal unthreaded holes in pneumatic and hydraulic components

43 products

Expansion Plugs

Seal pipe and tubing lines when checking for leaks

4 products

Drain Valves

Vent air or discharge liquids to remove excess fluid from your system

13 products

Pipe and Fittings

Generally thicker and more rigid than tubing for distributing liquids and gases

131 products

Tube and Tube Fittings

Typically more flexible than pipe for carrying liquids and gases in short runs around equipment

10 products

Hose and Hose Fittings

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

87 products

Breather Vents

Maintain even pressure and vacuum as temperatures change by allowing airflow in tanks and enclosures

4 products

Electrical Power, Networking, and Controlling

Electrical Enclosure Plugs

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

6 products

Cord Grips

Securely connect cords to enclosures while sealing out dirt and moisture

460 products

Mini Connector Caps

Shield mini connectors when they're not in use

5 products

Mil. Spec. Connector Caps

Protect Mil. Spec. connectors when they're not in use

12 products

Metric Circular Connector Caps

Keep metric circular connectors safe when they're not in use

4 products

Fastening and Joining

Press-Fit Nuts

Push into drilled or punched holes to add threads to thin panels

2 products

Standoff Caps

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

1 product

Fabricating and Machining

Fixture Plate Plugs

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

2 products

Safety Equipment

Fire Hydrant Caps

Pair with a hook-style spanner wrench to quickly cover and uncover fire hydrants

1 product