Aluminum (Class 150) Threaded Pipe Fittings

	Pipe Size Pipe Size

1/8

1/4

	Thread Type Thread Type

NPT

NPSL

	Type Type


Connector	Adapter

Union	Plug

Bushing	Reducing Adapter

Reducer	Locknut

Cap

	Material Material

6061 Aluminum

356 Aluminum

	Shape Shape


Straight	90° Elbow

Cap/Plug	45° Elbow

Tee	180° Bend

Cross

	Connection Style Connection Style

Threaded

Butt Weld

	Gender Gender

Female

Male

	For Use With For Use With

Air

Oil

Water

	Length Length

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

DFARS Specialty Metals
COTS-Exempt

	Drive Style Drive Style


External Square	Square

	Specifications Met Specifications Met

ASME

Mil. Spec.

	Body Shape Body Shape


Hex	Square

	Hex Width Hex Width

	Wall Thickness Wall Thickness

	Tee Style Tee Style


Inline	Right Angle

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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.

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. To prevent cracking, do not tighten more than a 1/4-turn past hand tight.

Union connectors separate into three pieces so you can access your line without unthreading pipe connections.

Threaded female x butt weld straight adapters are also known as half couplings.

Locknuts thread onto the male end of a fitting to provide extra holding power so the fitting won’t loosen from vibration.

Female x male 90° elbow adapters are also known as street elbows.

180° bend connectors are also known as U-bends.

Inline tees are also known as branch tees. Right-angle tees are also known as run tees.

NPTF (Dryseal) threads and NPSL (National Pipe Straight Locknut) threads are compatible with NPT threads.

For technical drawings and 3-D models, click on a part number.

Straight Connectors

For Use With: Air, Oil, Water
Class: 150
Pipe Nipples and Pipe: Use Schedule 40 aluminum
Flanges: Use Class 125 aluminum

NPT Female
Pipe Size	Max. Pressure		Each
1/8	150 psi @ 72° F	00000000	00000
1/4	150 psi @ 72° F	000000000	0000
3/8	150 psi @ 72° F	000000000	0000
1/2	150 psi @ 72° F	00000000	0000
3/4	150 psi @ 72° F	00000000	0000
1	150 psi @ 72° F	00000000	0000
1 1/4	150 psi @ 72° F	00000000	0000
1 1/2	150 psi @ 72° F	00000000	0000
2	150 psi @ 72° F	000000000	0000
2 1/2	150 psi @ 72° F	000000000	00000
3	150 psi @ 72° F	000000000	00000
4	150 psi @ 72° F	000000000	00000
6	150 psi @ 72° F	000000000	000000

Union Straight Connectors

Exploded View

For Use With: Air, Oil, Water
Pipe Nipples and Pipe: Use Schedule 40 aluminum
Flanges: Use Class 125 aluminum

NPT Female
Pipe Size	Max. Pressure		Each
1/8	150 psi @ 72° F	000000000	000000
1/4	150 psi @ 72° F	000000000	00000
3/8	150 psi @ 72° F	000000000	00000
1/2	150 psi @ 72° F	000000000	00000
3/4	150 psi @ 72° F	000000000	00000
1	150 psi @ 72° F	000000000	00000
1 1/4	150 psi @ 72° F	000000000	00000
1 1/2	150 psi @ 72° F	000000000	00000
2	150 psi @ 72° F	000000000	00000
2 1/2	150 psi @ 72° F	000000000	00000
3	150 psi @ 72° F	000000000	000000
4	150 psi @ 72° F	000000000	000000

Straight Adapters

For Use With: Air, Oil, Water
Specifications Met: ASME B1.20.1, MIL-DTL-52618
Class: 150
Pipe Nipples and Pipe: Use Schedule 40 aluminum
Flanges: Use Class 125 aluminum

NPT Female × Butt Weld
Pipe Size	Max. Pressure		Each
1/8	150 psi @ 72° F	000000000	00000
1/4	150 psi @ 72° F	000000000	0000
3/8	150 psi @ 72° F	000000000	0000
1/2	150 psi @ 72° F	000000000	0000
3/4	150 psi @ 72° F	00000000	0000
1	150 psi @ 72° F	000000000	0000
1 1/4	150 psi @ 72° F	000000000	0000
1 1/2	150 psi @ 72° F	000000000	0000
2	150 psi @ 72° F	000000000	0000
2 1/2	150 psi @ 72° F	000000000	00000
3	150 psi @ 72° F	000000000	00000
4	150 psi @ 72° F	000000000	00000
6	150 psi @ 72° F	000000000	000000

Bushing Straight Reducing Adapters

For Use With: Air, Oil, Water
Specifications Met: ASME B1.20.1, MIL-DTL-52618
Class: 150
Pipe Nipples and Pipe: Use Schedule 40 aluminum
Flanges: Use Class 125 aluminum

Pipe Size
(A)	(B)	Max. Pressure		Each
NPT Male × NPT Female
1/4	1/8	150 psi @ 72° F	000000000	00000
3/8	1/8	150 psi @ 72° F	000000000	0000
3/8	1/4	150 psi @ 72° F	000000000	0000
1/2	1/8	150 psi @ 72° F	000000000	0000
1/2	1/4	150 psi @ 72° F	000000000	0000
1/2	3/8	150 psi @ 72° F	000000000	0000
3/4	1/4	150 psi @ 72° F	000000000	0000
3/4	3/8	150 psi @ 72° F	000000000	0000
3/4	1/2	150 psi @ 72° F	000000000	0000
1	1/4	150 psi @ 72° F	000000000	0000
1	1/2	150 psi @ 72° F	000000000	0000
1	3/4	150 psi @ 72° F	000000000	0000
1 1/4	3/4	150 psi @ 72° F	000000000	0000
1 1/4	1	150 psi @ 72° F	000000000	0000
1 1/2	1/2	150 psi @ 72° F	000000000	00000
1 1/2	3/4	150 psi @ 72° F	000000000	00000
1 1/2	1	150 psi @ 72° F	000000000	00000
1 1/2	1 1/4	150 psi @ 72° F	000000000	00000
2	3/4	150 psi @ 72° F	000000000	00000
2	1	150 psi @ 72° F	000000000	00000
2	1 1/4	150 psi @ 72° F	000000000	00000
2	1 1/2	150 psi @ 72° F	000000000	00000
2 1/2	1	150 psi @ 72° F	000000000	00000
3	1 1/2	150 psi @ 72° F	000000000	00000
3	2	150 psi @ 72° F	000000000	00000
3	2 1/2	150 psi @ 72° F	000000000	00000
4	2	150 psi @ 72° F	000000000	00000
4	3	150 psi @ 72° F	000000000	00000

Straight Reducers

For Use With: Air, Oil, Water
Specifications Met: ASME B1.20.1, MIL-DTL-52618
Class: 150
Pipe Nipples and Pipe: Use Schedule 40 aluminum
Flanges: Use Class 125 aluminum

Pipe Size
(A)	(B)	Max. Pressure		Each
NPT Female
1/4	1/8	150 psi @ 72° F	000000000	00000
3/8	1/8	150 psi @ 72° F	000000000	0000
3/8	1/4	150 psi @ 72° F	000000000	0000
1/2	1/4	150 psi @ 72° F	000000000	0000
1/2	3/8	150 psi @ 72° F	000000000	0000
3/4	1/4	150 psi @ 72° F	000000000	0000
3/4	1/2	150 psi @ 72° F	000000000	0000
1	1/2	150 psi @ 72° F	000000000	00000
1	3/4	150 psi @ 72° F	000000000	00000
1 1/4	1	150 psi @ 72° F	000000000	00000
1 1/2	1	150 psi @ 72° F	000000000	00000
1 1/2	1 1/4	150 psi @ 72° F	000000000	00000
2	1 1/2	150 psi @ 72° F	000000000	00000
3	2	150 psi @ 72° F	000000000	00000
4	3	150 psi @ 72° F	000000000	000000

Locknuts

For Use With: Air, Oil, Water
Class: 150
Pipe Nipples and Pipe: Use Schedule 40 aluminum
Flanges: Use Class 125 aluminum

NPSL Female
Pipe Size	Max. Pressure		Each
1/4	150 psi @ 72° F	000000000	00000
3/8	150 psi @ 72° F	000000000	0000
1/2	150 psi @ 72° F	000000000	0000
3/4	150 psi @ 72° F	000000000	0000
1	150 psi @ 72° F	000000000	00000
1 1/4	150 psi @ 72° F	000000000	00000
1 1/2	150 psi @ 72° F	000000000	00000
2	150 psi @ 72° F	000000000	00000
2 1/2	150 psi @ 72° F	000000000	00000
3	150 psi @ 72° F	000000000	00000

90° Elbow Connectors

For Use With: Air, Oil, Water
Class: 150
Pipe Nipples and Pipe: Use Schedule 40 aluminum
Flanges: Use Class 125 aluminum

NPT Female
Pipe Size	Max. Pressure		Each
1/8	150 psi @ 72° F	000000000	00000
1/4	150 psi @ 72° F	000000000	0000
3/8	150 psi @ 72° F	000000000	0000
1/2	150 psi @ 72° F	000000000	0000
3/4	150 psi @ 72° F	000000000	00000
1	150 psi @ 72° F	000000000	00000
1 1/4	150 psi @ 72° F	000000000	00000
1 1/2	150 psi @ 72° F	000000000	00000
2	150 psi @ 72° F	000000000	00000
2 1/2	150 psi @ 72° F	000000000	00000
3	150 psi @ 72° F	000000000	00000
4	150 psi @ 72° F	000000000	000000
6	150 psi @ 72° F	000000000	000000

90° Elbow Adapters

For Use With: Air, Oil, Water
Class: 150
Pipe Nipples and Pipe: Use Schedule 40 aluminum
Flanges: Use Class 125 aluminum

NPT Female × NPT Male
Pipe Size	Max. Pressure		Each
1/8	150 psi @ 72° F	000000000	00000
1/4	150 psi @ 72° F	000000000	0000
3/8	150 psi @ 72° F	000000000	0000
1/2	150 psi @ 72° F	000000000	00000
3/4	150 psi @ 72° F	000000000	00000
1	150 psi @ 72° F	00000000	00000
1 1/4	150 psi @ 72° F	000000000	00000
1 1/2	150 psi @ 72° F	000000000	00000
2	150 psi @ 72° F	000000000	00000
2 1/2	150 psi @ 72° F	000000000	00000
3	150 psi @ 72° F	000000000	000000
4	150 psi @ 72° F	000000000	000000

90° Elbow Reducers

For Use With: Air, Oil, Water
Specifications Met: ASME B1.20.1, MIL-DTL-52618
Class: 150
Pipe Nipples and Pipe: Use Schedule 40 aluminum
Flanges: Use Class 125 aluminum

Pipe Size
(A)	(B)	Max. Pressure		Each
NPT Female
1/2	1/4	150 psi @ 72° F	000000000	000000
1/2	3/8	150 psi @ 72° F	000000000	00000
3/4	1/2	150 psi @ 72° F	000000000	00000
1	1/2	150 psi @ 72° F	000000000	00000
1	3/4	150 psi @ 72° F	000000000	00000
1 1/4	1	150 psi @ 72° F	000000000	00000
1 1/2	1	150 psi @ 72° F	000000000	00000
1 1/2	1 1/4	150 psi @ 72° F	000000000	00000
2	1 1/2	150 psi @ 72° F	000000000	00000
3	2	150 psi @ 72° F	000000000	000000
3	2 1/2	150 psi @ 72° F	000000000	000000
4	3	150 psi @ 72° F	000000000	000000

45° Elbow Connectors

For Use With: Air, Oil, Water
Class: 150
Pipe Nipples and Pipe: Use Schedule 40 aluminum
Flanges: Use Class 125 aluminum

NPT Female
Pipe Size	Max. Pressure		Each
1/8	150 psi @ 72° F	000000000	00000
1/4	150 psi @ 72° F	000000000	0000
3/8	150 psi @ 72° F	000000000	0000
1/2	150 psi @ 72° F	00000000	00000
3/4	150 psi @ 72° F	000000000	00000
1	150 psi @ 72° F	000000000	00000
1 1/4	150 psi @ 72° F	000000000	00000
1 1/2	150 psi @ 72° F	000000000	00000
2	150 psi @ 72° F	000000000	00000
2 1/2	150 psi @ 72° F	000000000	00000
3	150 psi @ 72° F	000000000	00000
4	150 psi @ 72° F	000000000	000000
6	150 psi @ 72° F	000000000	000000

45° Elbow Adapters

For Use With: Air, Oil, Water
Specifications Met: ASME B1.20.1, MIL-DTL-52618
Class: 150
Pipe Nipples and Pipe: Use Schedule 40 aluminum
Flanges: Use Class 125 aluminum

NPT Female × NPT Male
Pipe Size	Max. Pressure		Each
1/2	150 psi @ 72° F	000000000	000000
3/4	150 psi @ 72° F	000000000	00000
1	150 psi @ 72° F	000000000	00000
1 1/4	150 psi @ 72° F	000000000	00000
1 1/2	150 psi @ 72° F	000000000	00000
2	150 psi @ 72° F	000000000	00000
2 1/2	150 psi @ 72° F	000000000	00000

180° Bend Connectors

For Use With: Air, Oil, Water
Class: 150
Pipe Nipples and Pipe: Use Schedule 40 aluminum
Flanges: Use Class 125 aluminum

NPT Female
Pipe Size	Max. Pressure		Each
1/2	150 psi @ 72° F	000000000	000000
3/4	150 psi @ 72° F	000000000	00000
1	150 psi @ 72° F	000000000	00000
1 1/4	150 psi @ 72° F	000000000	00000
1 1/2	150 psi @ 72° F	000000000	00000
2	150 psi @ 72° F	000000000	000000

Tee Connectors

For Use With: Air, Oil, Water
Class: 150
Pipe Nipples and Pipe: Use Schedule 40 aluminum
Flanges: Use Class 125 aluminum

NPT Female
Pipe Size	Max. Pressure		Each
1/8	150 psi @ 72° F	000000000	00000
1/4	150 psi @ 72° F	000000000	0000
3/8	150 psi @ 72° F	000000000	0000
1/2	150 psi @ 72° F	000000000	00000
3/4	150 psi @ 72° F	000000000	00000
1	150 psi @ 72° F	000000000	00000
1 1/4	150 psi @ 72° F	000000000	00000
1 1/2	150 psi @ 72° F	000000000	00000
2	150 psi @ 72° F	000000000	00000
2 1/2	150 psi @ 72° F	000000000	00000
3	150 psi @ 72° F	000000000	000000
4	150 psi @ 72° F	000000000	000000

Inline Tee Reducers

For Use With: Air, Oil, Water
Class: 150
Pipe Nipples and Pipe: Use Schedule 40 aluminum
Flanges: Use Class 125 aluminum

Pipe Size
(A)	(B)	Max. Pressure		Each
NPT Female
1/2	1/4	150 psi @ 72° F	000000000	000000
1/2	3/4	150 psi @ 72° F	000000000	00000
3/4	3/8	150 psi @ 72° F	000000000	00000
3/4	1/2	150 psi @ 72° F	000000000	00000
1	1/2	150 psi @ 72° F	000000000	00000
1	1 1/2	150 psi @ 72° F	000000000	00000
1 1/4	3/4	150 psi @ 72° F	000000000	00000
1 1/4	1	150 psi @ 72° F	000000000	00000
1 1/2	1/2	150 psi @ 72° F	000000000	00000
1 1/2	3/4	150 psi @ 72° F	000000000	00000
1 1/2	1	150 psi @ 72° F	000000000	00000
1 1/2	2	150 psi @ 72° F	000000000	00000
2	3/4	150 psi @ 72° F	000000000	00000
2	1	150 psi @ 72° F	000000000	00000
3	2	150 psi @ 72° F	000000000	000000
4	2	150 psi @ 72° F	000000000	000000

Right-Angle Tee Reducers

For Use With: Air, Oil, Water
Specifications Met: ASME B1.20.1, MIL-DTL-52618
Class: 150
Pipe Nipples and Pipe: Use Schedule 40 aluminum
Flanges: Use Class 125 aluminum

Pipe Size
(A)	(B)	Max. Pressure		Each
NPT Female
1/2	3/4	150 psi @ 72° F	000000000	000000
1/2	1	150 psi @ 72° F	000000000	00000
3/4	1/2	150 psi @ 72° F	000000000	00000
3/4	1	150 psi @ 72° F	000000000	00000
1	3/4	150 psi @ 72° F	000000000	00000
1	1 1/2	150 psi @ 72° F	000000000	00000
1 1/2	3/4	150 psi @ 72° F	000000000	00000
2	1 1/2	150 psi @ 72° F	000000000	00000

Cross Connectors

For Use With: Air, Oil, Water
Class: 150
Pipe Nipples and Pipe: Use Schedule 40 aluminum
Flanges: Use Class 125 aluminum

NPT Female
Pipe Size	Max. Pressure		Each
1/8	150 psi @ 72° F	000000000	00000
1/4	150 psi @ 72° F	000000000	0000
3/8	150 psi @ 72° F	000000000	00000
1/2	150 psi @ 72° F	000000000	00000
3/4	150 psi @ 72° F	000000000	00000
1	150 psi @ 72° F	000000000	00000
1 1/4	150 psi @ 72° F	000000000	00000
1 1/2	150 psi @ 72° F	000000000	00000
2	150 psi @ 72° F	000000000	00000
2 1/2	150 psi @ 72° F	000000000	000000
3	150 psi @ 72° F	000000000	000000
4	150 psi @ 72° F	000000000	000000

Caps

For Use With: Air, Oil, Water
Class: 150
Pipe Nipples and Pipe: Use Schedule 40 aluminum
Flanges: Use Class 125 aluminum

NPT Female
Pipe Size	Max. Pressure		Each
1/8	150 psi @ 72° F	000000000	00000
1/4	150 psi @ 72° F	000000000	0000
3/8	150 psi @ 72° F	000000000	0000
1/2	150 psi @ 72° F	000000000	0000
3/4	150 psi @ 72° F	000000000	0000
1	150 psi @ 72° F	000000000	0000
1 1/4	150 psi @ 72° F	000000000	0000
1 1/2	150 psi @ 72° F	000000000	00000
2	150 psi @ 72° F	000000000	00000
2 1/2	150 psi @ 72° F	000000000	00000
3	150 psi @ 72° F	000000000	00000
4	150 psi @ 72° F	000000000	00000
6	150 psi @ 72° F	000000000	000000

Plugs with Square Drive

For Use With: Air, Oil, Water
Class: 150
Pipe Nipples and Pipe: Use Schedule 40 aluminum
Flanges: Use Class 125 aluminum

NPT Male
Pipe Size	Plug Construction	Max. Pressure		Each
3/8	Solid	150 psi @ 72° F	000000000	00000
1/2	Solid	150 psi @ 72° F	000000000	0000
3/4	Solid	150 psi @ 72° F	000000000	0000
1	Solid	150 psi @ 72° F	000000000	0000
1 1/4	Solid	150 psi @ 72° F	000000000	00000
1 1/2	Solid	150 psi @ 72° F	000000000	00000
2	Solid	150 psi @ 72° F	000000000	00000
2 1/2	Solid	150 psi @ 72° F	000000000	00000
3	Solid	150 psi @ 72° F	000000000	00000
4	Solid	150 psi @ 72° F	000000000	00000

Plugs with External Square Drive

For Use With: Air, Oil, Water
Class: 150
Pipe Nipples and Pipe: Use Schedule 40 aluminum
Flanges: Use Class 125 aluminum

NPT Male
Pipe Size	Plug Construction	Max. Pressure		Each
1/8	Solid	150 psi @ 72° F	000000000	00000
1/4	Solid	150 psi @ 72° F	000000000	0000
3/8	Solid	150 psi @ 72° F	000000000	0000
1/2	Solid	150 psi @ 72° F	000000000	0000
3/4	Solid	150 psi @ 72° F	000000000	0000
1	Solid	150 psi @ 72° F	000000000	0000
1 1/4	Solid	150 psi @ 72° F	000000000	0000
1 1/2	Solid	150 psi @ 72° F	000000000	0000
2	Solid	150 psi @ 72° F	000000000	0000
2 1/2	Solid	150 psi @ 72° F	000000000	00000
3	Solid	150 psi @ 72° F	000000000	00000
4	Solid	150 psi @ 72° F	000000000	00000
6	Solid	150 psi @ 72° F	000000000	00000