Metric Caps | McMaster-Carr

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1,426 Products

Most Likely Products

Pipe and Fittings

Generally thicker and more rigid than tubing for distributing liquids and gases

437 products

Tube Fittings

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

149 products

Protective Plugs

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

47 products

Metric Circular Connector Caps

Keep metric circular connectors safe when they're not in use

7 products

Cap Nuts

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

69 products

T-Slotted Framing and Fittings

The most versatile system, attach fittings along the continuous slots to build virtually anything

94 products

All Results

Fluid Handling

Pipe and Fittings

Generally thicker and more rigid than tubing for distributing liquids and gases

437 products

Tube Fittings

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

149 products

Hose Fittings

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

7 products

Breather Vents

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

24 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

12 products

Building and Machinery Hardware

Protective Plugs

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

47 products

T-Slotted Framing and Fittings

The most versatile system, attach fittings along the continuous slots to build virtually anything

94 products

Knobs

Position, tighten, and secure fixtures and equipment

125 products

Leveling Mount Inserts

Slip onto equipment and furniture to add threaded-stud leveling feet

15 products

Electrical Power, Networking, and Controlling

Metric Circular Connector Caps

Keep metric circular connectors safe when they're not in use

7 products

Solenoid Valve Sockets

Pair with plugs or receptacles to connect solenoid components

1 product

Metric Circular Connectors

Plugs, sockets, receptacles, and adapters for equipment with metric connections

40 products

Latching Connector Inserts

Male and female inserts for making connections inside hoods and bases

4 products

Power Connectors

Plugs, sockets, receptacles, and other connectors for powering equipment

16 products

Wire Splices

Connect wires end to end to extend or repair a run

6 products

USB Cords

Transfer data between computers, printers, and mobile devices

1 product

Power Cords

Connect equipment and devices to a power source

4 products

Electrical Enclosure Plugs

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

9 products

Electrical Enclosure Drains

Release moisture to keep components dry

2 products

Electrical Enclosure Drain Vents

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

5 products

Circuit Breaker Box Filler Plates

Conceal live electrical components in circuit breaker boxes to prevent injury and damage

2 products

Fastening and Joining

Cap Nuts

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

69 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

Retaining Rings

Hold components on a shaft

51 products

Lubricating

Grease Fitting Adapters

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

11 products

Grease Fittings

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

184 products

Measuring and Inspecting

Variance Indicator Caps

Cover and color-code the spindle on your variance indicator

1 product

Safety Equipment

Clothing Kits

Head-to-toe protection from electrical arc flashes, chemical splashes, welding sparks, and more

1 product