Aluminum Hole Plugs | McMaster-Carr

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Product Family

Breather Vents

Cord Grips

Drain Valves

Electrical Enclosure Plugs

Metric Circular Connector Caps

Mil. Spec. Connector Caps

Slip-On Framing and Fittings

Material

For Use With

System of Measurement

Pipe Size

Shape

Knockout Trade Size

Cord OD

Thread Type

Fitting Type

Thread Size

Environment

Fitting Connection

Knockout Connection

Gender

Cord Holding Type

REACH

RoHS

Compliant with Exemptions

Connects To

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Coupling Size

Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

For Cord Shape

Maximum Temperature

Enclosure Rating

943 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

454 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

Building and Machinery Hardware

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 End Caps

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

9 products

Grommets

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

24 products

Fluid Handling

Pipe and Fittings

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

147 products

Hose Fittings

Create threaded, barbed, quick-disconnect, and other types of connections between lengths of hose

87 products

Tube Fittings

Make threaded, push to connect, barbed, and other types of connections between lengths of tube

10 products

Breather Vents

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

4 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

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