Sealing Plugs | McMaster-Carr

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5,062 Products

Building and Machinery Hardware

Protective Plugs

Protective Plugs

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

Protective Caps

Protective Caps

Cover holes at the end of pipe, conduit, and fittings to keep out debris

Fluid Handling

Pipe Plugs

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

Pipe Caps

Cover the ends of pipe to keep out dirt and debris

Pipe Fittings

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

Hose and Hose Fittings

Hose and Hose Fittings

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

Expansion Plugs

Expansion Plugs

Seal pipe and tubing lines when checking for leaks

Bore Sealing Plugs

Bore Sealing Plugs

Permanently seal unthreaded holes in pneumatic and hydraulic components

Heat Exchanger Plugs

Heat Exchanger Plugs

Plug leaky internal tubes in heat exchangers

Electrical

Electrical Enclosure Plugs

Electrical Enclosure Plugs

Cover unused holes in enclosures to keep out dust, dirt, and moisture

Outlet Boxes

House electrical components such as on-off switches, receptacles, and dimmer knobs

DIN Rail Caps

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

Outlet Box Extenders

Outlet Box Extenders

Add depth to an outlet box when there’s not enough space for components

Electrical Connector Seals

Electrical Connector Seals

Add to the front or back of connectors to block out dust, debris, and weather

Electrical Connector Clips

Electrical Connector Clips

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

Data Port Locks

Data Port Locks

Block USB or Ethernet ports from unauthorized use

Capacitor Boots

Capacitor Boots

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

Fastening and Joining

Quick-Release Pin Receptacles

Quick-Release Pin Receptacles

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

Quick-Release Pin Retaining Caps

Quick-Release Pin Retaining Caps

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

Standoff Caps

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

Retaining Rings

Retaining Rings

Hold components on a shaft

Press-Fit Nuts

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

Fabricating and Machining

Fixture Plate Plugs

Fixture Plate Plugs

Keep chips and shavings from clogging or damaging unused holes on fixture plates in milling machines

Facility and Grounds Maintenance

Shower Stoppers

Shower Stoppers

Push down to plunge and cut trapped material to prevent clogs

Sink Drain Stoppers

Sink Drain Stoppers

Plug drains to fill up sinks and tubs

Floor Drain Trap Seals

Floor Drain Trap Seals

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

Drain Cleanouts

Drain Cleanouts

Create an access point to inspect and clean floor drain pipelines

Rebar Caps

Brightly colored to alert workers to exposed rebar and pipe

Containers, Storage, and Furniture

Drum Plugs

Seal drum lid openings

Dust Covers

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

Safety Equipment

Floor Drain Plugs

Floor Drain Plugs

Prevent oil and other spills from going down your floor drain

Material Handling

Conveyor Guide Mounting Rod Caps

Conveyor Guide Mounting Rod Caps

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

Heating, Ventilation, and Air Conditioning

Air Conditioner Service Valve Caps

Air Conditioner Service Valve Caps

Seal off AC service valves to prevent refrigerant from leaking out

Communication

Tamper-Evident Seals

Tamper-Evident Seals

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

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)