Aluminum Tube Caps | McMaster-Carr

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	Material Material

6061 Aluminum

	For Tube Material For Tube Material

Aluminum

	Type Type


Cap	Plug

Flange

	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 Type Thread Type

	For Shape For Shape

	Round

	System of Measurement System of Measurement

Inch

Metric

	For OD For OD

	Cap Type Cap Type


Push On	Screw On

	For Use With For Use With

	Drive Style Drive Style


External Hex	External Square

Hex	Square

	For Pipe Material For Pipe Material

Aluminum

	Connection Style Connection Style

	Thread Size Thread Size

	Profile Profile

	Straight

	For Pipe Schedule For Pipe Schedule


40	80

	Maximum Pressure Maximum Pressure

150 psi @ 72° F

1,500 psi @ 72° F

3,000 psi @ 72° F

	Length Length

	Gender Gender

Female

Male

	Connection Type Connection Type


Tube	Pipe

	Maximum Temperature Maximum Temperature

250° to 499° F

500° to 999° F

Not Rated

	For Connection Type For Connection Type

Straight-Thread Pipe

Unthreaded Pipe

37° Flared Tube

	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

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169 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.

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.

Threaded Round Plugs
for Straight-Thread Pipe

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

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.

Pipe, Tubing, Hose, and 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°.

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

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How to Identify and Measure Fittings

Caps and Plugs

Threaded Round Plugsfor 37° Flared Tube

Threaded Round Plugsfor Straight-Thread Pipe

Metal Round Caps

Threaded Caps

Threaded Standoff Caps

Pipe, Tubing, Hose, and Fittings

37° Flared Fittingsfor Aluminum Tubing

Standard-Wall Butt-Weld AluminumUnthreaded Pipe Fittings

Aluminum Unthreaded Pipe Flanges

Low-Pressure AluminumThreaded Pipe Fittings

High-Pressure AluminumThreaded Pipe Fittings

Threaded Round Plugs
for 37° Flared Tube

Threaded Round Plugs
for Straight-Thread Pipe

37° Flared Fittings
for Aluminum Tubing

Standard-Wall Butt-Weld Aluminum
Unthreaded Pipe Fittings

Low-Pressure Aluminum
Threaded Pipe Fittings

High-Pressure Aluminum
Threaded Pipe Fittings