Rubber Hole Plugs | McMaster-Carr

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2,153 Products

Building and Machinery Hardware

Protective Plugs

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

371 products

Protective Caps

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

138 products

Grommets

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

643 products

Bumpers

Absorb impact to protect equipment and surfaces from dents and scuffs

245 products

Vibration-Damping Mounts

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

63 products

Fluid Handling

Expansion Plugs

Seal pipe and tubing lines when checking for leaks

335 products

Drain Valves

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

5 products

Tube Fittings

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

65 products

Hose Fittings

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

26 products

Pipe Caps

Cover the ends of pipe to keep out dirt and debris

17 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

1 product

Cable Entry Panels

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

83 products

Cord Grips

Securely connect cords to enclosures while sealing out dirt and moisture

14 products

Data Port Plugs

Keep dust, debris, and moisture out of unused computer ports

2 products

Power Connector Caps

Cover pin-and-sleeve power connectors when they're not in use

34 products

Capacitor Boots

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

3 products

Fastening and Joining

Threaded Inserts

Create new threads or repair stripped threads

1 product

Press-Fit Nuts

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

2 products

Facility and Grounds Maintenance

Sink Drain Stoppers

Plug drains to fill up sinks and tubs

4 products

Floor Drain Trap Seals

Stop sewer gases from escaping through rarely used floor drains if the P-trap dries out

4 products

Drain Check Valves

Prevent water damage by placing into floor drains to stop sewer back-ups

3 products

Safety Equipment

Earplugs

Protect your hearing in loud environments without the bulk of earmuffs

18 products

Floor Drain Plugs

Prevent oil and other spills from going down your floor drain

3 products

Spill-Control Drain Covers

Block grates and manholes so liquid can't get in and odors can't get out

6 products

Lubricating

Grease Fitting Caps

Protect grease fittings from dirt, debris, and moisture

1 product

Containers, Storage, and Furniture

Drum Plugs

Seal drum lid openings

16 products

Drum Locks

Secure drum lids and openings to prevent tampering

1 product