Plugs | McMaster-Carr

Filter by

System of Measurement

Pipe Size

Material

Fitting Type

Thread Type

Drive Style

Shape

Gender

Pipe Material

For Use With

Thread Size

ID

Color

Length

NEMA Style

Plug Connection Method

Maximum Pressure @ Temperature

Body Shape

Drive Size

Voltage

RoHS

REACH Compliance

DFARS Compliance

How can we improve?

24,585 Products

Most Likely Products

Pipe Plugs

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

Protective Plugs

Protective Plugs

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

Electrical Plugs

Electrical Plugs

Pair with sockets or receptacles to transmit power or data

All Results

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 Flanges

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

Pipe Fittings

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

Tube End Plugs

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

Tube End Caps

Cover the ends of tube to keep out dirt and debris

Tube Fittings

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

Tubing Flow Stops

Tubing Flow Stops

Temporarily block water flow to make soldering repairs without waiting for your line to drain

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

Drain Valves

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

Breather Vents

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

Pressure Test Fittings

Pressure Test Fittings

Create a temporary connection point for gauges and other testing equipment

Pressure-Relief Valves

Pressure-Relief Valves

Protect equipment by opening at a set pressure and closing when the pressure drops; for repeated use

Sights

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

Liquid-Level Gauges

Liquid-Level Gauges

Monitor fluid levels in containers

Heat Exchanger Plugs

Heat Exchanger Plugs

Plug leaky internal tubes in heat exchangers

Heating Elements

Heating Elements

Turn electrical current into heat

Corrosion-Inhibiting Rods and Pads

Corrosion-Inhibiting Rods and Pads

Protect tanks, water heaters, and heat exchangers from rust; also known as sacrificial anodes

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

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

Grommets

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

Bumpers

Absorb impact to protect equipment and surfaces from dents and scuffs

Countertop Trash Chutes

Countertop Trash Chutes

Finish the hole over a waste container

Vibration-Damping Mounts

Vibration-Damping Mounts

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

Slip-On Framing and Fittings

Slip-On Framing and Fittings

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

Strut Channel Framing and Fittings

Strut Channel Framing and Fittings

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

Electrical

Electrical Plugs

Electrical Plugs

Pair with sockets or receptacles to transmit power or data

Electrical Sockets

Electrical Sockets

Pair with plugs or receptacles to transmit power or data

Electrical Receptacles

Electrical Receptacles

Install in a wall or panel to transmit power or data to plugs or sockets

Electrical Cords

Electrical Cords

Connect equipment and devices to a power supply

Electrical Adapters

Electrical Adapters

Change electrical connectors to another type, size, or gender

Electrical Cord Adapters

Electrical Cord Adapters

Change the electrical connection style between an outlet and your equipment

Electrical Connector Caps

Electrical Connector Caps

Protect data connectors when not in use

Outlet Strips

Plug in multiple devices to power them from a single outlet

Terminal Blocks

Terminal Blocks

Mate with terminals to complete circuits in control panels, motors, and small machines

Electrical Connector Seals

Electrical Connector Seals

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

Electrical Connector Boots

Electrical Connector Boots

Protect connectors and cords from strain, bends, and pulls

Wall Plates

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

Electrical Cord Locks

Electrical Cord Locks

Cover mated connectors on electrical cords to prevent disconnection

Development Board Cords

Development Board Cords

Connect your development board to components such as sensors and actuators

Binding Posts

Test circuits before making permanent connections

Electrical Cord Circuit Interrupter Converters

Electrical Cord Circuit Interrupter Converters

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

Data Connection Hubs

Data Connection Hubs

Add USB, DisplayPort, or HDMI ports to your computer to connect multiple device

Electrical Connector Contacts

Electrical Connector Contacts

Crimp wire into pins and sleeves to create custom Molex or Amphenol connectors

Wire Splices

Join wire and protect the connection

Terminals

Attach to the end of wire to connect circuits in control panels, motors, and small machines

Distribution Bars

Distribution Bars

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

Electrical Connector Clips

Electrical Connector Clips

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

Distribution Blocks

Distribution Blocks

Distribute electricity from a single power source to several devices in a circuit

Distribution Posts

Distribution Posts

Send power from one source to several devices in a circuit in less space than a distribution block

Data Port Locks

Data Port Locks

Block USB or Ethernet ports from unauthorized use

Electrical Contact Installation Tools

Electrical Contact Installation Tools

Add or remove pin-and-sleeve contacts in connectors

Electrical Cord Holders

Electrical Cord Holders

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

Electrical Enclosure Plugs

Electrical Enclosure Plugs

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

Electrical Enclosure Drains

Electrical Enclosure Drains

Release moisture to keep components dry

Electrical Enclosure Drain Vents

Electrical Enclosure Drain Vents

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

Electrical Enclosure Vents

Electrical Enclosure Vents

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

Cord Grips

Securely connect cords to enclosures while sealing out dirt and moisture

Cable Entry Panels

Cable Entry Panels

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

Outlet Boxes

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

Heat-Shrink Tubing

Heat-Shrink Tubing

Apply heat to seal and insulate electrical wiring and connections

DIN Rail Caps

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

Interference Suppressing Clips

Interference Suppressing Clips

Shield cable from EMI and RFI that can distort signals; also known as ferrite beads

Voltage Adapters

Voltage Adapters

Change AC voltage to DC voltage to power a device

Inverters

Transform DC voltage to power devices that run on AC voltage; prevent overload damage

Wire and Cable Crimpers

Wire and Cable Crimpers

Crimp connectors onto electrical wire or cable

Wire Stripper Crimpers

Wire Stripper Crimpers

Strip wire and crimp connectors with one tool

Wire and Cable Crimper Dies

Wire and Cable Crimper Dies

Attach to cordless crimpers to secure connectors onto cable

Battery Chargers

Battery Chargers

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

Capacitor Boots

Capacitor Boots

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

Circuit Breaker Box Filler Plates

Circuit Breaker Box Filler Plates

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

Light Switch/Receptacles

Light Switch/Receptacles

Combine a switch and receptacle into a single outlet box for a small footprint

Fastening and Joining

Socket Head Screws

Socket Head Screws

With a deeper drive than flat and rounded head screws, these withstand more torque for a tighter hold

Rounded Head Screws

Rounded Head Screws

Sit just above the surface for a low-profile finish and hold tighter than flat head screws

Hex Head Screws

Hex Head Screws

Used with nuts to create a stronger joint than flat and rounded screws

Flat Head Screws

Flat Head Screws

Fit in countersunk holes for a flush finish

Tapping Screws

Fasten a range of materials together without needing to tap the hole first

Wood Screws

Fasten material to wood or pieces of wood to each other

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

Dowel Pins

Align parts before assembly or use as a pivot, shaft, or hinge to join moving components

Standoff Caps

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

Rivets

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

Threaded Inserts

Threaded Inserts

Create new threads or repair stripped threads

Press-Fit Nuts

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

Fabric Snaps

Join soft, heavy fabrics such as leather and canvas

Turn-Button Fastener Bases

Turn-Button Fastener Bases

Mate with turn-button fastener eyelets to secure fabrics to solid surfaces

Turn-Button Fastener Eyelets

Turn-Button Fastener Eyelets

Pair with turn-button fastener bases to secure fabrics to solid surfaces

Retaining Rings

Retaining Rings

Hold components on a shaft

Wood Joiners

Connect and repair wood pieces and joints

Lubricating

Grease Fittings

Grease Fittings

Create an inlet on equipment and machinery for injecting lubricant; also known as Zerk fittings

Grease Fitting Adapters

Grease Fitting Adapters

Mate grease fittings when the sizes and thread types don't match

Grease Fitting Caps

Grease Fitting Caps

Protect grease fittings from dirt, debris, and moisture

Grease Fitting Cleaning Tools

Grease Fitting Cleaning Tools

Flush out old grease, dirt, and debris from clogged fittings

Grease Fitting Junction Blocks

Grease Fitting Junction Blocks

Send different types and amounts of grease from multiple grease fittings to lubricate several points

Grease Fitting Repair Tools

Grease Fitting Repair Tools

Remove and repair broken or clogged grease fittings and re-tap threaded holes

Grease Fitting Manifolds

Grease Fitting Manifolds

Lubricate multiple points with the same amount and type of grease using one grease fitting

Grease Fitting Installation Tools

Grease Fitting Installation Tools

Tap to insert grease fittings in unthreaded holes

Oil Fittings

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

Safety Equipment

Fire Hydrant Caps

Fire Hydrant Caps

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

Fire Hydrant Plugs

Fire Hydrant Plugs

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

Fire Stops

Prevent fire and smoke from passing through holes in fire-resistant walls and floors

Earplugs

Protect your hearing in loud environments without the bulk of earmuffs

Safety Glasses

Shield your eyes from dirt, sunlight, lasers, and electrical and welding sparks

Floor Drain Plugs

Floor Drain Plugs

Prevent oil and other spills from going down your floor drain

Spill-Control Drain Covers

Spill-Control Drain Covers

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

Bearing Guards

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

Measuring and Inspecting

Test Lead Adapters

Test Lead Adapters

Change tip styles to take different measurements with the same test leads

Test Leads

Pair with electrical testers such as multimeters to analyze your devices

Test Lead Tips

Adapt Fluke test leads to perform electrical tests in tight spaces

Patch Cords

Make point-to-point connections between electrical testing equipment and your devices

Power Consumption Meters

Power Consumption Meters

Measure the amount of power your devices consume to help calculate energy costs

BNC Test Cords

Connect oscilloscopes and other testers to your equipment

BNC Adapters

Convert a BNC cord to a double banana connector so it can be used with electrical testers

Hose Coupling Size-Identification Kits

Hose Coupling Size-Identification Kits

Match your hose coupling to one of the plugs to determine its size without measuring

Threaded Hole Location Gauges

Threaded Hole Location Gauges

Pinpoint the true center of threaded holes to precisely align and measure parts

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

Containers, Storage, and Furniture

Drum Plugs

Seal drum lid openings

Drum-Plug Caps

Access inside drums to fill them

Drum Locks

Secure drum lids and openings to prevent tampering

Dust Covers

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

Stacking Caps and Targets

Stacking Caps and Targets

Turn the ends of posts into stackable shelving and rack systems

Earplug Dispensers

Earplug Dispensers

Keep earplugs accessible and ready to use

Communication

Telephone Connectors

Telephone Connectors

Replace the plug on your phone cord, or extend your line by connecting cords together

Microphone Connectors

Microphone Connectors

Replace or adapt your current microphone connector to fit your system

Microphone Cords

Microphone Cords

Plug your microphone into an amplifier or speaker

Flash Drives

Store data, take it on the go, and transfer it to other devices with a USB port

Tamper-Evident Seals

Tamper-Evident Seals

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

Facility and Grounds Maintenance

Sink Drain Stoppers

Sink Drain Stoppers

Plug drains to fill up sinks and tubs

Sink Drain Strainers

Sink Drain Strainers

Catch debris to prevent clogs and plug drains to fill sinks

Sink Drains

Empty liquids from sinks into sewer lines

Shower Stoppers

Shower Stoppers

Push down to plunge and cut trapped material to prevent clogs

Drain Check Valves

Drain Check Valves

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

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

Faucet Hole Covers

Faucet Hole Covers

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

Manhole Covers

Made of cast iron to handle high-volume foot and vehicle traffic

Storm Drain Filters

Storm Drain Filters

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

Rebar Caps

Brightly colored to alert workers to exposed rebar and pipe

Sealing

Tube Fitting Gaskets

Tube Fitting Gaskets

Prevent leaks when connecting sanitary tube fittings

Drum-Plug Gaskets

Drum-Plug Gaskets

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

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

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