Steel Pipe Plugs | McMaster-Carr

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1,957 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 Fittings

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

31 products

Pipe Flanges

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

70 products

Tube and Tube Fittings

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

78 products

Hose and Hose Fittings

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

420 products

Expansion Plugs

Seal pipe and tubing lines when checking for leaks

121 products

Bore Sealing Plugs

Permanently seal unthreaded holes in pneumatic and hydraulic components

19 products

Pressure-Relief Valves

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

17 products

Breather Vents

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

10 products

Pressure Test Fittings

Create a temporary connection point for gauges and other testing equipment

2 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 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 Junction Blocks

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

6 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

Fabricating and Machining

Fixture Plate Plugs

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

1 product

Building and Machinery Hardware

Protective Caps

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

14 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

Fastening and Joining

Retaining Rings

Hold components on a shaft

21 products

Standoff Caps

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

23 products