NPT Plugs | McMaster-Carr

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DFARS Specialty Metals

Exempt

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

Yes

Export Control Classification Number (ECCN)

3,932 Products

Fluid Handling

Pipe Plugs

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

810 products

Pipe Caps

Cover the ends of pipe to keep out dirt and debris

293 products

Hose

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

48 products

Hose Fittings

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

676 products

Tube and Tube Fittings

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

99 products

Breather Vents

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

75 products

Pressure Test Fittings

Create a temporary connection point for gauges and other testing equipment

31 products

Pressure-Relief Valves

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

14 products

Expansion Plugs

Seal pipe and tubing lines when checking for leaks

40 products

Drain Valves

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

86 products

Bore Sealing Plug Installation Tools

Set sealing plugs into unthreaded holes in pneumatic and hydraulic components

8 products

Sights

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

128 products

Liquid-Level Gauges

Monitor fluid levels in containers

11 products

Corrosion-Inhibiting Rods and Pads

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

29 products

Heating Elements

Turn electrical current into heat

212 products

Building and Machinery Hardware

Protective Plugs

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

76 products

Protective Caps

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

41 products

Electrical Power, Networking, and Controlling

Electrical Enclosure Plugs

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

10 products

Cord Grips

Securely connect cords to enclosures while sealing out dirt and moisture

802 products

Electrical Enclosure Drains

Release moisture to keep components dry

2 products

Latching Connectors

Protect connections in wet or harsh environments while keeping them accessible

66 products

Power Receptacles

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

24 products

Solenoid Valve Connectors

Sockets and receptacles to connect solenoid components, such as valves and motors

4 products

Mini Receptacles

Install in walls and panels and pair with plugs to send power and signal

46 products

Metric Circular Receptacles

Install in walls and panels and pair with plugs to make metric connections

60 products

Mini Cords

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

2 products

Lubricating

Grease Fitting Adapters

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

33 products

Grease Fittings

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

29 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

1 product

Oil Fittings

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

8 products

Containers, Storage, and Furniture

Drum Plug Adapters

Screw into plastic drum openings to replace threads that can become damaged with frequent use

1 product

Drum Plug Caps

Access inside drums to fill them

4 products

Drum Plugs

Seal drum lid openings

4 products

Drum Locks

Secure drum lids and openings to prevent tampering

1 product

Measuring and Inspecting

Plug Gauges

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

38 products

Fastening and Joining

Threaded Inserts

Create new threads or repair stripped threads

16 products

Facility and Grounds Maintenance

Sink Drains

Empty liquids from sinks into sewer lines

6 products