Aluminum End Caps | McMaster-Carr

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	Material Material

	For Pipe Material For Pipe Material

Aluminum

	System of Measurement System of Measurement

Inch

Metric

	For OD For OD

	For Shape For Shape


Round	Square

	Type Type


Cap	Plug

Flange	Adapter

	Cap Type Cap Type


Push On	Screw On

	Pipe Size Pipe Size

1/16
1/8
1/4
3/8
1/2
3/4
1
1 1/4
1 1/2
2
2 1/2
3
4
6
8

	Thread Size Thread Size

	Thread Type Thread Type

	For Pipe Size For Pipe Size

1/4
3/8
1/2
3/4
1
1 1/4
1 1/2
2
2 1/2
3
3 1/2
4
5
6

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Profile Profile

	Straight

	For Use With For Use With

	Connection Style Connection Style

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

	Inside Height Inside Height

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Shape Shape


Cap/Plug	Cap

Straight

	Coupling Size Coupling Size

	Maximum Temperature Maximum Temperature

	Body Material Body Material

Aluminum

	Cap Material Cap Material

Aluminum

	For Tube Material For Tube Material

Aluminum

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398 Products

How to Identify and Measure Fittings

Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.

Metal Round Caps

More durable than plastic caps, these provide the most protection from abrasion and impact.

Threaded Caps

Protect externally threaded components from contaminants during fabrication and storage.

Threaded Standoff Caps

Give open-ended standoffs a finished look and protect them from dirt and debris.

Metal Square Plugs

More durable than plastic plugs, these provide the most protection from abrasion and impact. Use them to eliminate sharp edges and create a finished look on metal fence and machine-guard posts. Drive them in place with a hammer for a secure fit.

Threaded Round Plugs for Straight-Thread Pipe

Seal tube and hose fittings to keep their straight threads protected from contaminants during fabrication and storage.

Threaded Round Plugs for 37° Flared Tube

Designed to fit into 37° flared connections such as those found on JIC and SAE fittings, these plugs protect internally threaded connections from contaminants during fabrication and storage.

Strut Channel Covers

Create a four-sided raceway for cable, or give a more finished look to strut channel structures.

Aluminum Slip-On Framing and Fittings

Half the weight of steel, this aluminum framing resists corrosion in wet environments.

Pipe, Tubing, Hose, and Fittings

Standard-Wall Butt-Weld Aluminum
Unthreaded Pipe Fittings

Also known as Schedule 40 fittings, these have thicker walls than our thin-wall aluminum unthreaded pipe fittings.

Aluminum Unthreaded Pipe Flanges

Use these unthreaded flanges in low-pressure applications. Also known as Pressure Class 125 flanges.

Low-Pressure Aluminum Threaded Pipe Fittings

In addition to being lightweight, these aluminum fittings offer good corrosion resistance. Use them in low-pressure flow applications.

High-Pressure Aluminum Threaded Pipe Fittings

Also known as Pressure Class 3000 fittings, these have the highest pressure rating of all the aluminum pipe fittings we offer.

Medium-Pressure Aluminum Threaded Pipe Fittings

Designed for medium-pressure applications, these fittings have better strength than our low-pressure aluminum pipe fittings.

37° Flared Fittings for Aluminum Tubing

Also known as JIC (Joint Industrial Council) fittings, these provide a tight seal on tubing that is flared to 37°.

Metal Cam-and-Groove Hose
Couplings for Chemicals and Petroleum

Couplings are metal, which has better durability than plastic cam-and-groove hose couplings. They consist of a plug and a socket that connect and disconnect quickly. Use them if you need frequent access to a line. To connect, insert the plug into the socket and push the levers down.

Metal Cam-and-Groove Hose Couplings for Water

Metal cam-and-groove couplings have better durability than plastic cam-and-groove couplings.

Pin-Lug Fire Hydrant Caps

These caps are the fastest way to close off or access your water line. They have a bracket that snaps into any type of 2 1/2 size female fire hose threads. Tap on one of the pin lugs to remove quickly in an emergency.

Gas and Chimney Vents

Gas Chimney Vents and Fittings

For use with gas-fired equipment, such as boilers and furnaces, these vent pipes and fittings withstand temperatures up to 400° F. Also known as type B gas vents.

Chimney Vent Caps

Cover chimneys to reduce downdrafts and prevent obstructions from entering.

Bench Vise Jaw Liners

Drop-In Bench Vise Jaw Liners

Insert these one-piece grooved liners between vise jaws to hold small-diameter material vertically.

Set-Screw-Mount Bench Vise Jaw Liners

Place over the jaws and tighten the screws to securely attach liners.

Wraparound Bench Vise Jaw Liners

Fold the pliable tabs over the jaws to install.

Magnetic-Mount Bench Vise Jaw Liners

Choose from flat and grooved liners.

Lockable Breather Vents with Cap

Secure access to vented openings in pipe and tanks—the cap can be locked to prevent tampering.

Sensor Connectors

Caps for Micro M12 Screw-Together Connectors

Protect screw-together M12 connectors when not in use.

Caps for Mini Connectors

Protect mini connectors when not in use.

Thread Adapters for Mini Connectors

Join two connectors that both have internal threads.