Rubber Plugs | McMaster-Carr

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Chromate Conversion Coated

Chrome Plated

Corrosion-Resistant Coated

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Thread Type

UN/UNF (SAE Straight)

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Tamper-Resistant Torx

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Fluorescent Green/Red

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Compliant with Exemptions

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Compliant

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Export Control Classification Number (ECCN)

2B999

5A991

EAR99

DFARS Specialty Metals

Seal Material

Body Material

7,307 Products

Fluid Handling

Pipe Plugs

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

210 products

Pipe Caps

Cover the ends of pipe to keep out dirt and debris

34 products

Pipe Flanges

Bolt together with a gasket to create an access point within a line

5 products

Tube End Plugs

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

41 products

Tube Fittings

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

443 products

Tube End Caps

Cover the ends of tube to keep out dirt and debris

54 products

Tube End Cap and Plug Kits

Cover or insert into the ends of tube fittings to keep out dirt and debris

1 product

Hose and Hose Fittings

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

634 products

Expansion Plugs

Seal pipe and tubing lines when checking for leaks

343 products

Drain Valves

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

5 products

Sights

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

149 products

Liquid-Level Gauges

Monitor fluid levels in containers

9 products

Pressure Test Fittings

Create a temporary connection point for gauges and other testing equipment

31 products

Breather Vents

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

26 products

Building and Machinery Hardware

Protective Plugs

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

372 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

583 products

Bumpers

Absorb impact to protect equipment and surfaces from dents and scuffs

235 products

Vibration-Damping Mounts

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

70 products

Electrical

Electrical Plugs

Pair with sockets or receptacles to transmit power or data

114 products

Electrical Sockets

Pair with plugs or receptacles to transmit power or data

122 products

Electrical Receptacles

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

111 products

Electrical Cords

Connect equipment and devices to a power supply

742 products

Electrical Connector Caps

Protect data connectors when not in use

34 products

Electrical Adapters

Change electrical connectors to another type, size, or gender

23 products

Data Port Plugs

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

2 products

Electrical Connector Boots

Protect connectors and cords from strain, bends, and pulls

2 products

Electrical Cord Adapters

Change the electrical connection style between an outlet and your equipment

2 products

Terminal Blocks

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

46 products

Binding Posts

Test circuits before making permanent connections

1 product

Distribution Blocks

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

8 products

Outlet Strips

Plug in multiple devices to power them from a single outlet

4 products

Electrical Enclosure Plugs

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

1 product

Electrical Enclosure Vents

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

10 products

Electrical Enclosure Drain Vents

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

5 products

Cord Grips

Securely connect cords to enclosures while sealing out dirt and moisture

1,109 products

Cable Entry Panels

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

83 products

Wire and Cable Crimpers

Crimp connectors onto electrical wire or cable

15 products

Wire Stripper Crimpers

Strip wire and crimp connectors with one tool

3 products

Capacitor Boots

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

3 products

Fastening and Joining

Socket Head Screws

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

351 products

Rounded Head Screws

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

261 products

Hex Head Screws

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

126 products

Flat Head Screws

Fit in countersunk holes for a flush finish that won't snag on surrounding parts

242 products

Tapping Screws

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

133 products

Wood Screws

Fasten material to wood or pieces of wood to each other

4 products

Press-Fit Nuts

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

2 products

Threaded Inserts

Create new threads or repair stripped threads

1 product

Drum Plug Wrenches

Install and remove screw-in drum plugs; also known as bung wrenches

4 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

Manhole Covers

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

1 product

Containers, Storage, and Furniture

Drum Plugs

Seal drum lid openings

10 products

Drum Locks

Secure drum lids and openings to prevent tampering

1 product

Safety Equipment

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

Earplugs

Protect your hearing in loud environments without the bulk of earmuffs

16 products

Safety Glasses

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

5 products

Lubricating

Grease Fitting Caps

Protect grease fittings from dirt, debris, and moisture

1 product

Grease Fittings

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

4 products

Measuring and Inspecting

Test Leads

Pair with electrical testers such as multimeters to analyze your devices

23 products

Patch Cords

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

1 product

Sealing

Tube Fitting Gaskets

Prevent leaks when connecting sanitary tube fittings

6 products

Drum Plug Gaskets

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

5 products

Fabricating and Machining

Fixture Plate Plugs

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

3 products