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)

Drive Style

Tamper-Resistant Torx

Shape

Color

Fluorescent Green/Red

For Use With

Alcohol-Based Solvents

Deutsch Style Connectors

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Band-and-Buckle Clamp

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Compliant with Exemptions

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U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

Export Control Classification Number (ECCN)

2B999

5A991

EAR99

DFARS Specialty Metals

Seal Material

Body Material

7,396 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 Fittings

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

539 products

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

335 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

14 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

371 products

Protective Caps

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

157 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

267 products

Vibration-Damping Mounts

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

64 products

Electrical Power, Networking, and Controlling

Power Connectors

Plugs, sockets, receptacles, and other connectors for powering equipment

314 products

Power Connector Caps

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

34 products

Metric Circular Connectors

Plugs, sockets, receptacles, and adapters for equipment with metric connections

21 products

Strain-Relief Connector Boots

Protect connectors and cords from strain, bends, and pulls

2 products

Latching Connectors

Protect connections in wet or harsh environments while keeping them accessible

9 products

D-Sub Connectors

Plugs, sockets, receptacles, and adapters for connecting computers, monitors, and printers

10 products

Han Connectors

Plugs and sockets to make Han connections

4 products

Mini Adapters

Create a branch off a main cord or connect multiple devices with mini connections to a single port

8 products

Extension Cords

Extend the reach of power from an outlet

130 products

Metric Circular Cords

Send power and signal to equipment with metric connections

282 products

Power Cords

Connect equipment and devices to a power source

11 products

Mini Cords

Often used to send power and control signals to automated systems, motors, and pumps

142 products

Ethernet Cords

Send data between computers, printers, servers, and switches

177 products

Solenoid Valve Cords

Connect solenoid components, such as valves and motors

6 products

Sensor Signal Adapter Cords

Send data between sensors and receivers that have different signal types

2 products

Data Port Plugs

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

2 products

Welding Cable Connectors

Plugs and sockets to deliver power to welding cable

13 products

Terminal Blocks

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

46 products

Distribution Blocks

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

8 products

Binding Posts

Test circuits before making permanent connections

1 product

Outlet Strips

Plug in multiple devices to power them from a single outlet

4 products

Cord Grips

Securely connect cords to enclosures while sealing out dirt and moisture

1,090 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

Cable Entry Panels

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

83 products

Electrical Enclosure Drain Vents

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

5 products

Heat-Shrink Tubing

Apply heat to seal and insulate electrical wiring and connections

3 products

Wire and Cable Crimpers

Crimp connectors onto electrical wire or cable

26 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

435 products

Rounded Head Screws

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

271 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

241 products

Tapping Screws

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

130 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

16 products

Drum Locks

Secure drum lids and openings to prevent tampering

1 product

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

Fabricating and Machining

Fixture Plate Plugs

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

3 products

Safety Equipment

Earplugs

Protect your hearing in loud environments without the bulk of earmuffs

22 products

Safety Glasses

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

5 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

Grease Fittings

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

4 products

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