Plastic Plugs | McMaster-Carr

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4,409 Products

Building and Machinery Hardware

Protective Plugs

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

467 products

Protective Caps

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

844 products

Grommets

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

253 products

Bumpers

Absorb impact to protect equipment and surfaces from dents and scuffs

18 products

Vibration-Damping Mounts

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

30 products

Slip-On Framing and Fittings

Insert rails into fittings and tighten screws to make guards, railings, and racks

11 products

Strut Channel Framing and Fittings

Secure fittings in the U-shaped channel to route conduit and pipe or build other structures

50 products

Fluid Handling

Pipe Plugs

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

184 products

Pipe Caps

Cover the ends of pipe to keep out dirt and debris

157 products

Pipe Flanges

Create an access point in a line by bolting two same-size flanges together with a gasket

37 products

Pipe Fittings

Form threaded, barbed, flanged, and other types of connections between lengths of pipe

4 products

Tube End Plugs

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

139 products

Tube End Caps

Cover the ends of tube to keep out dirt and debris

55 products

Tube Fittings

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

342 products

Hose and Hose Fittings

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

327 products

Expansion Plugs

Seal pipe and tubing lines when checking for leaks

54 products

Drain Valves

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

2 products

Breather Vents

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

61 products

Sights

Observe and monitor the contents of pipes, tanks, and other containers

30 products

Electrical

Electrical Enclosure Plugs

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

22 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

2 products

Electrical Enclosure Vents

Attach to sealed enclosures so air can flow to equalize temperature and pressure

5 products

Cord Grips

Securely connect cords to enclosures while sealing out dirt and moisture

499 products

Cable Entry Panels

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

55 products

Heat-Shrink Tubing

Apply heat to seal and insulate electrical wiring and connections

3 products

DIN Rail Caps

Guard the edges of DIN rail from damage and create a finished look

2 products

Electrical Adapters

Change electrical connectors to another type, size, or gender

27 products

Outlet Strips

Plug in multiple devices to power them from a single outlet

24 products

Wall Plates

Cover switches and outlets for a finished look or to close them off when not in use

64 products

Electrical Connector Caps

Protect data connectors when not in use

7 products

Electrical Cord Circuit Interrupter Converters

Hardwire to extension cords to protect against electric shock in wet areas

9 products

Data Port Plugs

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

1 product

Electrical Cord Locks

Cover mated connectors on extension cords to prevent disconnection

4 products

Electrical Connector Clips

Attach to data connectors to lock them in place, repair them, or color code them

4 products

Distribution Bar Brackets

Route electricity within switchboards and battery banks; also known as bus bars

2 products

Electrical Plugs

Pair with sockets or receptacles to transmit power or data

6 products

Electrical Sockets

Pair with plugs or receptacles to transmit power or data

4 products

Data Port Locks

Block USB or Ethernet ports from unauthorized use

9 products

Terminal Blocks

Create tidy rows of wire connections that you can identify, test, and adjust on the spot

38 products

Electrical Connector Boots

Protect connectors and cords from strain, bends, and pulls

1 product

Electrical Cord Holders

Keep extension cords, rope, hose, and chain tangle-free and ready to use

2 products

Circuit Breaker Box Filler Plates

Conceal live electrical components in circuit breaker boxes to prevent injury and damage

2 products

Battery Chargers

Charge everything from large-cell to cordless tool to household batteries

2 products

Wire and Cable Crimpers

Crimp connectors onto electrical wire or cable

1 product

Facility and Grounds Maintenance

Sink Drain Stoppers

Plug drains to fill up sinks and tubs

1 product

Sink Drains

Empty liquids from sinks into sewer lines

10 products

Shower Stoppers

Push down to plunge and cut trapped material to prevent clogs

1 product

Drain Cleanouts

Create an access point to inspect and clean floor drain pipelines

3 products

Floor Drain Trap Seals

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

4 products

Faucet Hole Covers

Close off unused faucet holes intended for soap dispensers and side sprayers

1 product

Rebar Caps

Brightly colored to alert workers to exposed rebar and pipe

4 products

Storm Drain Filters

Prevent leaves, sticks, and trash from washing down storm drains and grates

3 products

Containers, Storage, and Furniture

Drum Plugs

Seal drum lid openings

12 products

Dust Covers

Stretch over drums, pails, and other objects to keep out dust and debris

16 products

Safety Equipment

Earplugs

Protect your hearing in loud environments without the bulk of earmuffs

76 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

7 products

Bearing Guards

Shield bearings from dirt, and protect fingers and tools from moving parts

20 products

Fastening and Joining

Rivets

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

125 products

Threaded Inserts

Create new threads or repair stripped threads

16 products

Retaining Rings

Hold components on a shaft

12 products

Fabric Snaps

Complete snaps that join fabric together or fasten fabric to surfaces

5 products

Lubricating

Grease Fitting Caps

Protect grease fittings from dirt, debris, and moisture

13 products

Material Handling

Conveyor Guide Mounting Rod Caps

Cover the ends of conveyor guide mounting rods for a finished look

7 products

Sealing

Tube Fitting Gaskets

Prevent leaks when connecting sanitary tube fittings

12 products

Drum Plug Gaskets

Form a tighter seal in drum openings than with a drum plug alone

2 products

Communication

Tamper-Evident Seals

Secure hasps, latches, and other connections to visibly indicate tampering

2 products