Metric Caps | McMaster-Carr

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1,291 Products

Most Likely Products

Pipe Plugs

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

Tube End Caps

Cover the ends of tube to keep out dirt and debris

Pipe Caps

Cover the ends of pipe to keep out dirt and debris

Protective Plugs

Protective Plugs

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

Cap Nuts

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

T-Slotted Framing End Caps

T-Slotted Framing End Caps

Snap onto T-slotted rail ends to cover sharp edges and keep out dust

Electrical Connector Caps

Electrical Connector Caps

Protect data connectors when not in use

All Results

Fluid Handling

Pipe Plugs

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

Pipe Caps

Cover the ends of pipe to keep out dirt and debris

Pipe Flanges

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

Tube End Caps

Cover the ends of tube to keep out dirt and debris

Tube End Plugs

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

Tube Fittings

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

Hose and Hose Fittings

Hose and Hose Fittings

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

Sights

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

Breather Vents

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

Building and Machinery Hardware

Protective Plugs

Protective Plugs

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

T-Slotted Framing End Caps

T-Slotted Framing End Caps

Snap onto T-slotted rail ends to cover sharp edges and keep out dust

T-Slotted Framing Seals

T-Slotted Framing Seals

Fill gaps around doors and panels to keep air, dust, and liquid out of T-slotted framing structures

T-Slotted Framing Covers

T-Slotted Framing Covers

Block dust and debris from entering T-slotted rails; add a wear- or slip-resistant surface

T-Slotted Framing Mounts

T-Slotted Framing Mounts

Connect tubes, switches, casters, and other components to T-slotted rails

Knobs

Position, tighten, and secure fixtures and equipment

Leveling Mount Inserts

Leveling Mount Inserts

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

Electrical

Electrical Connector Caps

Electrical Connector Caps

Protect data connectors when not in use

Electrical Connectors and Cords

Electrical Connectors and Cords

Supply power to equipment by combining plugs, sockets, receptacles, and cords

Electrical Enclosure Plugs

Electrical Enclosure Plugs

Cover unused holes in enclosures to keep out dust, dirt, and moisture

Electrical Enclosure Drain Vents

Electrical Enclosure Drain Vents

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

Fastening and Joining

Cap Nuts

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

Retaining Rings

Retaining Rings

Hold components on a shaft

Quick-Release Pin Receptacles

Quick-Release Pin Receptacles

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

Quick-Release Pin Retaining Caps

Quick-Release Pin Retaining Caps

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

Measuring and Inspecting

Variance Indicator Caps

Variance Indicator Caps

Cover and color-code the spindle on your variance indicator

Lubricating

Grease Fitting Adapters

Grease Fitting Adapters

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

Grease Fittings

Grease Fittings

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

Containers, Storage, and Furniture

Drum Plugs

Seal drum lid openings

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)