Brass Hole Plugs | McMaster-Carr

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Drive Size

843 Products

Electrical

Electrical Enclosure Plugs

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

10 products

Cord Grips

Securely connect cords to enclosures while sealing out dirt and moisture

81 products

Cable Entry Panels

Pass multiple cords into an enclosure while sealing out moisture, dust, and other contaminants

3 products

Fluid Handling

Pipe Plugs

Insert into the ends of pipe to keep out dirt and debris

266 products

Pipe Caps

Cover the ends of pipe to keep out dirt and debris

67 products

Hose

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

1 product

Hose Fittings

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

9 products

Hose End Caps

Cover the ends of hose to keep out dirt and debris

18 products

Tube and Tube Fittings

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

75 products

Heat Exchanger Plugs

Plug leaky internal tubes in heat exchangers

17 products

Breather Vents

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

3 products

Pressure Test Fittings

Create a temporary connection point for gauges and other testing equipment

2 products

Drain Valves

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

4 products

Fastening and Joining

Standoff Caps

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

1 product

Building and Machinery Hardware

Grommets

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

120 products

Lubricating

Oil Fittings

Install in engine blocks and other machinery to pour in oil while keeping dust out

1 product

Containers, Storage, and Furniture

Drum Locks

Secure drum lids and openings to prevent tampering

2 products

Safety Equipment

Fire Hydrant Plugs

Pair with a hook-style spanner wrench to quickly seal fire hydrants and washdown equipment

3 products

Fire Hydrant Caps

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

3 products

Facility and Grounds Maintenance

Sink Drains

Empty liquids from sinks into sewer lines

4 products