Metric Hole Plugs | McMaster-Carr

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1,126 Products

Building and Machinery Hardware

Protective Plugs

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

56 products

Grommets

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

50 products

Electrical

Electrical Enclosure Plugs

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

9 products

Electrical Enclosure Drains

Release moisture to keep components dry

2 products

Electrical Enclosure Drain Vents

Prevent moisture from getting trapped inside enclosures while letting air flow through

5 products

Cable Entry Panels

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

27 products

Cord Grips

Securely connect cords to enclosures while sealing out dirt and moisture

118 products

Electrical Connector Caps

Protect data connectors when not in use

4 products

Fluid Handling

Pipe Plugs

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

452 products

Pipe Caps

Cover the ends of pipe to keep out dirt and debris

64 products

Tube and Tube Fittings

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

134 products

Hose and Hose Fittings

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

10 products

Breather Vents

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

29 products

Pressure Test Plugs

Tighten onto equipment to check pressure without permanently installing a gauge

3 products

Bore Sealing Plugs

Permanently seal unthreaded holes in pneumatic and hydraulic components

6 products

Expansion Plugs

Seal pipe and tubing lines when checking for leaks

4 products

Fastening and Joining

Quick-Release Pin Receptacles

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

10 products

Quick-Release Pin Retaining Caps

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

5 products

Rivets

Join materials together permanently, especially when too thin or fragile to fasten with screws

10 products

Containers, Storage, and Furniture

Drum Plugs

Seal drum lid openings

2 products