Threaded Plugs | McMaster-Carr

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Chicago Fire Department

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Acetic Acid (White Vinegar)

Acetic Acid (White Vinegar) (5% Concentration)

Acetic Acid (White Vinegar) (10% Concentration)

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EAR99

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8,220 Products

Fluid Handling

Pipe Plugs

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

1,329 products

Pipe Caps

Cover the ends of pipe to keep out dirt and debris

345 products

Pipe Fittings

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

4 products

Hose Fittings

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

908 products

Hose End Caps

Cover the ends of hose to keep out dirt and debris

9 products

Tube and Tube Fittings

Typically more flexible than pipe for carrying liquids and gases in short runs around equipment

127 products

Breather Vents

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

89 products

Pressure-Relief Valves

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

18 products

Pressure Test Fittings

Create a temporary connection point for gauges and other testing equipment

28 products

Sights

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

172 products

Expansion Plugs

Seal pipe and tubing lines when checking for leaks

5 products

Building and Machinery Hardware

Protective Plugs

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

179 products

Protective Caps

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

40 products

Electrical

Electrical Enclosure Plugs

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

29 products

Measuring and Inspecting

Plug Gauges

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

550 products

Threaded Hole Location Gauges

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

70 products

Hose Coupling Size-Identification Kits

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

1 product

Fastening and Joining

Cap Nuts

Cover and protect threads while adding a finished look; also known as acorn nuts

13 products

Standoff Caps

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

66 products

Threaded Inserts

Create new threads or repair stripped threads

3,012 products

Lubricating

Grease Fitting Adapters

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

41 products

Grease Fittings

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

330 products

Grease Fitting Installation Tools

Tap to insert grease fittings in unthreaded holes

2 products

Oil Fittings

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

17 products

Containers, Storage, and Furniture

Drum Plugs

Seal drum lid openings

19 products

Drum Locks

Secure drum lids and openings to prevent tampering

1 product

Drum-Plug Caps

Access inside drums to fill them

4 products

Safety Equipment

Fire Hydrant Plugs

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

3 products

Fire Hydrant Caps

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

4 products

Material Handling

Valve Stem Caps

Keep dust and debris out of tire valves

2 products

Sealing

Drum-Plug Gaskets

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

7 products