Metric Plugs | McMaster-Carr

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Fed. Spec. QQ-A-200/8

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2B999

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3,144 Products

Fluid Handling

Pipe Plugs

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

369 products

Pipe Caps

Cover the ends of pipe to keep out dirt and debris

46 products

Tube End Plugs

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

52 products

Tube End Caps

Cover the ends of tube to keep out dirt and debris

57 products

Tube Fittings

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

32 products

Hose and Hose Fittings

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

5 products

Breather Vents

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

24 products

Pressure Test Fittings

Create a temporary connection point for gauges and other testing equipment

2 products

Sights

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

6 products

Bore Sealing Plugs

Permanently seal unthreaded holes in pneumatic and hydraulic components

6 products

Bore Sealing Plug Installation Tools

Set sealing plugs into unthreaded holes in pneumatic and hydraulic components

1 product

Building and Machinery Hardware

Protective Plugs

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

37 products

Grommets

Protect wire, cable, and cords from holes with sharp or rough edges

50 products

Electrical

Electrical Enclosure Plugs

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

9 products

Electrical Enclosure Drain Vents

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

5 products

Electrical Enclosure Drains

Release moisture to keep components dry

2 products

Cable Entry Panels

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

27 products

Cord Grips

Securely connect cords to enclosures while sealing out dirt and moisture

118 products

Electrical Plugs

Pair with sockets or receptacles to transmit power or data

16 products

Electrical Sockets

Pair with plugs or receptacles to transmit power or data

11 products

Electrical Adapters

Change electrical connectors to another type, size, or gender

1 product

Electrical Receptacles

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

8 products

Electrical Connector Caps

Protect data connectors when not in use

4 products

Electrical Cords

Connect equipment and devices to a power supply

6 products

Distribution Bars

Route electricity within switchboards and battery banks; also known as bus bars

9 products

Terminal Blocks

Mate with terminals to complete circuits in control panels, motors, and small machines

137 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

167 products

Rounded Head Screws

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

61 products

Hex Head Screws

Used with nuts to create a stronger joint than flat and rounded screws

22 products

Flat Head Screws

Fit in countersunk holes for a flush finish

112 products

Quick-Release Pin Receptacles

Secure quick-release pins when you don’t have a through hole

10 products

Quick-Release Pin Retaining Caps

Hold quick-release pins in holes that are oversized or out of round

5 products

Dowel Pins

Align parts before assembly or use as a pivot, shaft, or hinge to join moving components

16 products

Threaded Inserts

Create new threads or repair stripped threads

1,016 products

Rivets

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

10 products

Lubricating

Grease Fittings

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

155 products

Grease Fitting Adapters

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

11 products

Measuring and Inspecting

Threaded Hole Location Gauges

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

31 products

Containers, Storage, and Furniture

Drum Plugs

Seal drum lid openings

2 products