Steel Plugs | McMaster-Carr

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OSHA Compliant 29 CFR 1926.701

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4,815 Products

Fluid Handling

Pipe Plugs

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

448 products

Pipe Caps

Cover the ends of pipe to keep out dirt and debris

160 products

Pipe Flanges

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

70 products

Tube End Plugs

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

22 products

Tube End Caps

Cover the ends of tube to keep out dirt and debris

56 products

Tube End Cap and Plug Kits

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

2 products

Tube Fittings

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

9 products

Hose Fittings

Create threaded, barbed, quick-disconnect, and other types of connections between lengths of hose

368 products

Hose End Caps

Cover the ends of hose to keep out dirt and debris

53 products

Hose

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

14 products

Expansion Plugs

Seal pipe and tubing lines when checking for leaks

121 products

Bore Sealing Plug Installation Tools

Set sealing plugs into unthreaded holes in pneumatic and hydraulic components

18 products

Bore Sealing Plugs

Permanently seal unthreaded holes in pneumatic and hydraulic components

19 products

Drain Valves

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

8 products

Breather Vents

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

59 products

Pressure-Relief Valves

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

17 products

Pressure Test Plugs

Tighten onto equipment to check pressure without permanently installing a gauge

3 products

Sights

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

46 products

Corrosion-Inhibiting Rods and Pads

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

27 products

Heating Elements

Turn electrical current into heat

34 products

Building and Machinery Hardware

Protective Plugs

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

103 products

Protective Caps

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

32 products

Strut Channel Framing and Fittings

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

24 products

Bumpers

Absorb impact to protect equipment and surfaces from dents and scuffs

10 products

Vibration-Damping Mounts

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

7 products

Electrical

Electrical Enclosure Plugs

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

27 products

Outlet Boxes

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

32 products

Cord Grips

Securely connect cords to enclosures while sealing out dirt and moisture

67 products

Cable Entry Panels

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

4 products

Electrical Receptacles

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

15 products

Electrical Plugs

Pair with sockets or receptacles to transmit power or data

19 products

Electrical Sockets

Pair with plugs or receptacles to transmit power or data

19 products

Outlet Strips

Plug in multiple devices to power them from a single outlet

34 products

Data Connection Hubs

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

1 product

Terminal Blocks

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

43 products

Electrical Adapters

Change electrical connectors to another type, size, or gender

4 products

Wire and Cable Crimpers

Crimp connectors onto electrical wire or cable

56 products

Wire Stripper Crimpers

Strip wire and crimp connectors with one tool

8 products

Wire and Cable Crimper Dies

Attach to cordless crimpers to secure connectors onto cable

63 products

Battery Chargers

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

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

Plug Cutters

Form wood plugs to conceal fastener heads in counterbored holes

8 products

Lubricating

Grease Fittings

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

259 products

Grease Fitting Adapters

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

24 products

Grease Fitting Manifolds

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

3 products

Grease Fitting Junction Blocks

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

6 products

Grease Fitting Repair Tools

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

2 products

Grease Fitting Installation Tools

Tap to insert grease fittings in unthreaded holes

2 products

Grease Fitting Cleaning Tools

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

1 product

Oil Fittings

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

28 products

Measuring and Inspecting

Hose Coupling Size-Identification Kits

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

1 product

Threaded Hole Location Gauges

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

70 products

Plug Gauges

Verify the diameter or threads of machined holes in finished parts; also called pin gauges

1,022 products

Test Leads

Pair with electrical testers such as multimeters to analyze your devices

1 product

Fastening and Joining

Threaded Inserts

Create new threads or repair stripped threads

675 products

Press-Fit Nuts

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

2 products

Standoff Caps

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

23 products

Retaining Rings

Hold components on a shaft

21 products

Tapping Screws

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

77 products

Rivets

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

2 products

Fabric Snaps

Complete snaps that join fabric together or fasten fabric to surfaces

2 products

Drum Plug Wrenches

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

10 products

Containers, Storage, and Furniture

Drum Plugs

Seal drum lid openings

5 products

Stacking Caps and Targets

Turn the ends of posts into stackable shelving and rack systems

6 products

Safety Equipment

Floor Drain Plugs

Prevent oil and other spills from going down your floor drain

3 products

Facility and Grounds Maintenance

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

2 products