Aluminum Class 150 Threaded Pipe Fittings

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How to Measure Threaded Pipe Size

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
Pressure 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	00000
1 1/2	150 psi @ 72° F	00000000	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

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

Straight Adapters

For Use With: Air, Oil, Water
Specifications Met: See table
Pressure Class: 150
Pipe Nipples and Pipe: Use Schedule 40 aluminum
Flanges: Use Class 125 aluminum

NPT Female × Butt Weld
Pipe Size	Max. Pressure	Specifications Met		Each
1/8	150 psi @ 72° F	ASME B1.20.1, ASTM B221	000000000	00000
1/4	150 psi @ 72° F	ASME B1.20.1, ASTM B221	000000000	0000
3/8	150 psi @ 72° F	ASME B1.20.1, ASTM A865, ASTM B221	000000000	0000
1/2	150 psi @ 72° F	ASME B1.20.1, ASTM A865, ASTM B221	000000000	0000
3/4	150 psi @ 72° F	ASME B1.20.1, ASTM B221	000000000	0000
1	150 psi @ 72° F	ASME B1.20.1, ASTM B221	000000000	0000
1 1/4	150 psi @ 72° F	ASME B1.20.1, ASTM A865, ASTM B221	000000000	0000
1 1/2	150 psi @ 72° F	ASME B1.20.1, ASTM A865, ASTM B221	000000000	0000
2	150 psi @ 72° F	ASME B1.20.1, ASTM A865, ASTM B221	000000000	00000
2 1/2	150 psi @ 72° F	ASME B1.20.1, ASTM B221	000000000	00000
3	150 psi @ 72° F	ASME B1.20.1, ASTM B221	000000000	00000
4	150 psi @ 72° F	ASME B1.20.1, ASTM A865, ASTM B221	000000000	00000
6	150 psi @ 72° F	ASME B1.20.1, ASTM A865, ASTM B221	000000000	000000

Bushing Straight Reducing Adapters

For Use With: Air, Oil, Water
Specifications Met: ASME B1.20.1, MIL-DTL-52618
Pressure 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	3/8	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	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	1 1/4	150 psi @ 72° F	000000000	00000
2	1/2	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
2 1/2	2	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	000000
4	3	150 psi @ 72° F	000000000	000000
6	3	150 psi @ 72° F	000000000	000000
6	4	150 psi @ 72° F	000000000	000000

Straight Reducers

For Use With: Air, Oil, Water
Specifications Met: ASME B1.20.1, MIL-DTL-52618
Pressure 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	000000
3/8	1/8	150 psi @ 72° F	000000000	00000
3/8	1/4	150 psi @ 72° F	000000000	00000
1/2	1/4	150 psi @ 72° F	000000000	00000
1/2	3/8	150 psi @ 72° F	000000000	00000
3/4	1/4	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	3/4	150 psi @ 72° F	000000000	00000
1 1/4	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	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	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 1/2	150 psi @ 72° F	000000000	00000
2 1/2	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
6	4	150 psi @ 72° F	000000000	000000

Locknuts

For Use With: Air, Oil, Water
Pressure 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	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

90° Elbow Connectors

For Use With: Air, Oil, Water
Pressure 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	00000
3	150 psi @ 72° F	000000000	000000
4	150 psi @ 72° F	000000000	000000
6	150 psi @ 72° F	000000000	000000

90° Elbow Adapters

For Use With: Air, Oil, Water
Pressure 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	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	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	000000
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
Pressure 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
4	3	150 psi @ 72° F	000000000	000000

45° Elbow Connectors

For Use With: Air, Oil, Water
Pressure 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	00000
3/8	150 psi @ 72° F	000000000	00000
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	000000
4	150 psi @ 72° F	000000000	000000

45° Elbow Adapters

For Use With: Air, Oil, Water
Specifications Met: ASME B1.20.1, MIL-DTL-52618
Pressure 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	000000

180° Bend Connectors

For Use With: Air, Oil, Water
Pressure 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

Tee Connectors

For Use With: Air, Oil, Water
Pressure 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	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	000000
3	150 psi @ 72° F	000000000	000000
4	150 psi @ 72° F	000000000	000000

Inline Tee Reducers

For Use With: Air, Oil, Water
Pressure 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 1/2	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	000000
2	3/4	150 psi @ 72° F	000000000	000000
2	1	150 psi @ 72° F	000000000	000000
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
Pressure 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	000000

Cross Connectors

For Use With: Air, Oil, Water
Pressure 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	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	000000
3	150 psi @ 72° F	000000000	000000

Caps

For Use With: Air, Oil, Water
Pressure 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	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	00000
6	150 psi @ 72° F	000000000	000000

Plugs with Square Drive

For Use With: Air, Oil, Water
Pressure 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	00000
1	Solid	150 psi @ 72° F	000000000	00000
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	000000

Plugs with External Square Drive

For Use With: Air, Oil, Water
Pressure 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	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
6	Solid	150 psi @ 72° F	000000000	000000

Plugs with Hex Drive

For Use With: Air, Water, Hydraulic Fluid
Specifications Met: ASME B1.20.1, ASME B16.11, ASTM B221, Fed. Spec. QQ-A-200/8
Pressure Class: 150
Pipe Nipples and Pipe: Use Schedule 80 aluminum

				Black Anodized 2011 Aluminum
Pipe Size	Drive Size	Plug Construction	Max. Pressure		Each
NPT Male
1/16	5/32"	Solid	150 psi @ 72° F	00000000	00000
1/8	3/16"	Solid	150 psi @ 72° F	00000000	0000
1/4	1/4"	Solid	150 psi @ 72° F	00000000	0000
3/8	5/16"	Solid	150 psi @ 72° F	00000000	0000
1/2	3/8"	Solid	150 psi @ 72° F	00000000	00000
3/4	9/16"	Solid	150 psi @ 72° F	00000000	00000
1	5/8"	Solid	150 psi @ 72° F	00000000	00000
1 1/4	3/4"	Solid	150 psi @ 72° F	00000000	00000
BSPT Male
1/8	3/16"	Solid	150 psi @ 72° F	00000000	0000
1/4	1/4"	Solid	150 psi @ 72° F	00000000	0000
3/8	5/16"	Solid	150 psi @ 72° F	00000000	0000
1/2	3/8"	Solid	150 psi @ 72° F	00000000	00000

Plugs with External Hex Drive

Metric and UNF Male Threads with Gasket

For Use With: Air, Water, Hydraulic Fluid
Specifications Met: ASME B1.20.1, ASME B16.11, ASTM B221, Fed. Spec. QQ-A-200/8
Pressure Class: 150
Pipe Nipples and Pipe: Use Schedule 80 aluminum

NPT Male
Pressure Class	Pipe Size	Thread Size	Thread Pitch, mm	Drive Size	Plug Construction	Max. Pressure		Each
150	1/16	__	__	5/16"	Solid	150 psi @ 72° F	00000000	00000
Metric Male
150	__	M3	0.5	1/4"	Solid	150 psi @ 72° F	00000000	0000
150	__	M6	1	7/16"	Solid	150 psi @ 72° F	00000000	0000
150	__	M10	1.25	5/8"	Solid	150 psi @ 72° F	00000000	0000
150	__	M12	1.25	11/16"	Solid	150 psi @ 72° F	00000000	0000
UNF Male
150	__	10-32	__	5/16"	Solid	150 psi @ 72° F	00000000	0000
150	__	7/16"-20	__	5/8"	Solid	150 psi @ 72° F	00000000	0000
150	__	9/16"-18	__	3/4"	Solid	150 psi @ 72° F	00000000	0000
150	__	3/4"-16	__	1 1/4"	Solid	150 psi @ 72° F	00000000	0000

Standard-Wall Aluminum Threaded Pipe Nipples and Pipe

Made of aluminum, this pipe is lightweight with good corrosion resistance. Also known as Schedule 40 pipe, it is for use in low-pressure applications. It is seamless, which provides a smooth interior for unrestricted flow.

Fully threaded pipe is also known as a close nipple; it is threaded on each end to the center.

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

NPT Fully Threaded

For Use With: Air, Oil, Water
Specifications Met: ASTM B241
Fittings: Use Class 150 aluminum
Flanges: Use Class 125 aluminum

Pipe Size	Lg.	Construction		Each
1/8	3/4"	Seamless	000000000	00000
1/4	7/8"	Seamless	000000000	0000
3/8	1"	Seamless	000000000	0000
1/2	1 1/8"	Seamless	000000000	0000
3/4	1 3/8"	Seamless	000000000	0000
1	1 1/2"	Seamless	000000000	0000
1 1/4	1 5/8"	Seamless	000000000	0000
1 1/2	1 3/4"	Seamless	000000000	0000
2	2"	Seamless	000000000	00000
2 1/2	2 1/2"	Seamless	000000000	00000
3	2 5/8"	Seamless	000000000	00000
4	2 7/8"	Seamless	000000000	00000

NPT Threaded on Both Ends— 1/8 to 1 Pipe Size

For Use With: Air, Oil, Water
Specifications Met: ASTM B241
Fittings: Use Class 150 aluminum
Flanges: Use Class 125 aluminum

1/8 Pipe Size
Lg.	Construction		Each
1 1/2"	Seamless	000000000	00000
2"	Seamless	000000000	0000
2 1/2"	Seamless	000000000	0000
3"	Seamless	000000000	0000
3 1/2"	Seamless	000000000	0000
4"	Seamless	000000000	0000
4 1/2"	Seamless	000000000	0000
5"	Seamless	000000000	0000
5 1/2"	Seamless	000000000	0000
6"	Seamless	000000000	0000
6 1/2"	Seamless	000000000	0000
7"	Seamless	000000000	0000
8"	Seamless	000000000	0000
9"	Seamless	000000000	0000
10"	Seamless	000000000	0000
11"	Seamless	000000000	00000
12"	Seamless	000000000	0000
14"	Seamless	00000000	00000
16"	Seamless	00000000	00000
18"	Seamless	0000000	00000
20"	Seamless	00000000	00000
22"	Seamless	00000000	00000
24"	Seamless	0000000	00000
36"	Seamless	0000000	00000
48"	Seamless	0000000	00000
60"	Seamless	0000000	00000
72"	Seamless	0000000	00000
120"	Seamless	00000000	000000
1/4 Pipe Size
1 1/2"	Seamless	000000000	0000
2"	Seamless	000000000	0000
2 1/2"	Seamless	000000000	0000
3"	Seamless	000000000	0000
3 1/2"	Seamless	000000000	0000
4"	Seamless	000000000	0000
4 1/2"	Seamless	000000000	0000
5"	Seamless	000000000	0000
5 1/2"	Seamless	000000000	0000
6"	Seamless	000000000	0000
6 1/2"	Seamless	000000000	0000
7"	Seamless	000000000	0000
8"	Seamless	000000000	0000
9"	Seamless	000000000	00000
10"	Seamless	000000000	00000
11"	Seamless	000000000	00000
12"	Seamless	000000000	00000
14"	Seamless	00000000	00000
16"	Seamless	00000000	00000
18"	Seamless	0000000	00000
20"	Seamless	00000000	00000
22"	Seamless	00000000	00000
24"	Seamless	0000000	00000
36"	Seamless	0000000	00000
48"	Seamless	0000000	00000
60"	Seamless	0000000	00000
72"	Seamless	000000	00000
120"	Seamless	00000000	000000
3/8 Pipe Size
1 1/2"	Seamless	000000000	0000
2"	Seamless	000000000	0000
2 1/2"	Seamless	000000000	0000
3"	Seamless	000000000	0000
3 1/2"	Seamless	000000000	0000
4"	Seamless	000000000	0000
4 1/2"	Seamless	000000000	0000
5"	Seamless	000000000	0000
5 1/2"	Seamless	000000000	0000
6"	Seamless	000000000	00000
6 1/2"	Seamless	000000000	00000
7"	Seamless	000000000	00000
8"	Seamless	000000000	00000
9"	Seamless	000000000	00000
10"	Seamless	000000000	00000
11"	Seamless	000000000	00000
12"	Seamless	000000000	00000
14"	Seamless	00000000	00000
16"	Seamless	00000000	00000
18"	Seamless	0000000	00000
20"	Seamless	00000000	00000
22"	Seamless	00000000	00000
24"	Seamless	0000000	00000
36"	Seamless	0000000	00000
48"	Seamless	0000000	00000
60"	Seamless	0000000	000000
72"	Seamless	0000000	000000
120"	Seamless	00000000	000000

1/2 Pipe Size
Lg.	Construction		Each
1 1/2"	Seamless	000000000	00000
2"	Seamless	000000000	0000
2 1/2"	Seamless	000000000	0000
3"	Seamless	000000000	0000
3 1/2"	Seamless	000000000	0000
4"	Seamless	000000000	0000
4 1/2"	Seamless	000000000	00000
5"	Seamless	000000000	00000
5 1/2"	Seamless	000000000	00000
6"	Seamless	000000000	00000
6 1/2"	Seamless	000000000	00000
7"	Seamless	000000000	00000
8"	Seamless	000000000	00000
9"	Seamless	000000000	00000
10"	Seamless	000000000	00000
11"	Seamless	000000000	00000
12"	Seamless	000000000	00000
14"	Seamless	00000000	00000
16"	Seamless	00000000	00000
18"	Seamless	0000000	00000
20"	Seamless	00000000	00000
22"	Seamless	00000000	00000
24"	Seamless	0000000	00000
36"	Seamless	0000000	00000
48"	Seamless	0000000	00000
60"	Seamless	00000000	000000
72"	Seamless	000000	000000
120"	Seamless	00000000	000000
3/4 Pipe Size
1 1/2"	Seamless	000000000	0000
2"	Seamless	000000000	0000
2 1/2"	Seamless	000000000	0000
3"	Seamless	000000000	0000
3 1/2"	Seamless	000000000	0000
4"	Seamless	000000000	00000
4 1/2"	Seamless	000000000	00000
5"	Seamless	000000000	00000
5 1/2"	Seamless	000000000	00000
6"	Seamless	000000000	00000
6 1/2"	Seamless	000000000	00000
7"	Seamless	000000000	00000
8"	Seamless	000000000	00000
9"	Seamless	000000000	00000
10"	Seamless	000000000	00000
11"	Seamless	000000000	00000
12"	Seamless	000000000	00000
14"	Seamless	00000000	00000
16"	Seamless	00000000	00000
18"	Seamless	0000000	00000
20"	Seamless	00000000	00000
22"	Seamless	00000000	00000
24"	Seamless	0000000	00000
36"	Seamless	0000000	00000
48"	Seamless	0000000	000000
60"	Seamless	00000000	000000
72"	Seamless	000000	000000
120"	Seamless	00000000	000000
1 Pipe Size
2"	Seamless	000000000	0000
2 1/2"	Seamless	000000000	0000
3"	Seamless	000000000	0000
3 1/2"	Seamless	000000000	00000
4"	Seamless	000000000	00000
4 1/2"	Seamless	000000000	00000
5"	Seamless	000000000	00000
5 1/2"	Seamless	000000000	00000
6"	Seamless	000000000	00000
6 1/2"	Seamless	000000000	00000
7"	Seamless	000000000	00000
8"	Seamless	000000000	00000
9"	Seamless	000000000	00000
10"	Seamless	000000000	00000
11"	Seamless	000000000	00000
12"	Seamless	000000000	00000
14"	Seamless	00000000	00000
16"	Seamless	00000000	00000
18"	Seamless	0000000	00000
20"	Seamless	00000000	00000
22"	Seamless	00000000	00000
24"	Seamless	0000000	00000
36"	Seamless	0000000	00000
48"	Seamless	0000000	000000
60"	Seamless	00000000	000000
72"	Seamless	000000	000000
120"	Seamless	00000000	000000

NPT Threaded on Both Ends— 1 1/4 to 6 Pipe Size

For Use With: Air, Oil, Water
Specifications Met: ASTM B241
Fittings: Use Class 150 aluminum
Flanges: Use Class 125 aluminum

1 1/4 Pipe Size
Lg.	Construction		Each
2"	Seamless	000000000	00000
2 1/2"	Seamless	000000000	0000
3"	Seamless	000000000	0000
3 1/2"	Seamless	000000000	00000
4"	Seamless	000000000	00000
4 1/2"	Seamless	000000000	00000
5"	Seamless	000000000	00000
5 1/2"	Seamless	000000000	00000
6"	Seamless	000000000	00000
6 1/2"	Seamless	000000000	00000
7"	Seamless	000000000	00000
8"	Seamless	000000000	00000
9"	Seamless	000000000	00000
10"	Seamless	000000000	00000
11"	Seamless	000000000	00000
12"	Seamless	000000000	00000
14"	Seamless	00000000	00000
16"	Seamless	00000000	00000
18"	Seamless	0000000	00000
20"	Seamless	00000000	00000
22"	Seamless	00000000	00000
24"	Seamless	0000000	00000
36"	Seamless	0000000	00000
48"	Seamless	0000000	000000
60"	Seamless	00000000	000000
72"	Seamless	000000	000000
120"	Seamless	00000000	000000
1 1/2 Pipe Size
2"	Seamless	000000000	0000
2 1/2"	Seamless	000000000	0000
3"	Seamless	000000000	00000
3 1/2"	Seamless	000000000	00000
4"	Seamless	000000000	00000
4 1/2"	Seamless	000000000	00000
5"	Seamless	000000000	00000
5 1/2"	Seamless	000000000	00000
6"	Seamless	000000000	00000
6 1/2"	Seamless	000000000	00000
7"	Seamless	000000000	00000
8"	Seamless	000000000	00000
9"	Seamless	000000000	00000
10"	Seamless	000000000	00000
11"	Seamless	000000000	00000
12"	Seamless	000000000	00000
14"	Seamless	00000000	00000
16"	Seamless	00000000	00000
18"	Seamless	0000000	00000
20"	Seamless	00000000	00000
22"	Seamless	00000000	00000
24"	Seamless	0000000	00000
36"	Seamless	0000000	00000
48"	Seamless	0000000	000000
60"	Seamless	00000000	000000
72"	Seamless	000000	000000
120"	Seamless	00000000	000000
2 Pipe Size
2 1/2"	Seamless	000000000	00000
3"	Seamless	000000000	00000
3 1/2"	Seamless	000000000	00000
4"	Seamless	000000000	00000
4 1/2"	Seamless	000000000	00000
5"	Seamless	000000000	00000
5 1/2"	Seamless	000000000	00000
6"	Seamless	000000000	00000
6 1/2"	Seamless	000000000	00000
7"	Seamless	000000000	00000
8"	Seamless	000000000	00000
9"	Seamless	000000000	00000
10"	Seamless	000000000	00000
11"	Seamless	000000000	00000
12"	Seamless	000000000	00000
14"	Seamless	00000000	00000
16"	Seamless	00000000	00000
18"	Seamless	0000000	00000
20"	Seamless	00000000	000000
22"	Seamless	00000000	000000
24"	Seamless	0000000	000000
36"	Seamless	0000000	000000
48"	Seamless	0000000	000000
60"	Seamless	00000000	000000
72"	Seamless	000000	000000
120"	Seamless	00000000	000000
2 1/2 Pipe Size
3"	Seamless	000000000	00000
3 1/2"	Seamless	000000000	00000
4"	Seamless	000000000	00000
4 1/2"	Seamless	000000000	00000
5"	Seamless	000000000	00000
5 1/2"	Seamless	000000000	00000
6"	Seamless	000000000	00000
6 1/2"	Seamless	000000000	00000
7"	Seamless	000000000	00000
8"	Seamless	000000000	00000
9"	Seamless	000000000	00000
10"	Seamless	000000000	00000
11"	Seamless	000000000	00000
12"	Seamless	000000000	00000
14"	Seamless	00000000	000000
16"	Seamless	00000000	000000
18"	Seamless	0000000	000000
20"	Seamless	00000000	000000
22"	Seamless	00000000	000000
24"	Seamless	0000000	000000
36"	Seamless	0000000	000000
48"	Seamless	0000000	000000
60"	Seamless	00000000	000000
72"	Seamless	000000	000000
120"	Seamless	00000000	000000

3 Pipe Size
Lg.	Construction		Each
3"	Seamless	000000000	000000
3 1/2"	Seamless	000000000	00000
4"	Seamless	000000000	00000
4 1/2"	Seamless	000000000	00000
5"	Seamless	000000000	00000
5 1/2"	Seamless	000000000	00000
6"	Seamless	000000000	00000
6 1/2"	Seamless	000000000	00000
7"	Seamless	000000000	00000
8"	Seamless	000000000	00000
9"	Seamless	000000000	00000
10"	Seamless	000000000	00000
11"	Seamless	000000000	000000
12"	Seamless	000000000	000000
14"	Seamless	00000000	000000
16"	Seamless	00000000	000000
18"	Seamless	0000000	000000
20"	Seamless	00000000	000000
22"	Seamless	00000000	000000
24"	Seamless	0000000	000000
36"	Seamless	0000000	000000
48"	Seamless	0000000	000000
60"	Seamless	00000000	000000
72"	Seamless	000000	000000
120"	Seamless	00000000	00000000
4 Pipe Size
3"	Seamless	000000000	00000
3 1/2"	Seamless	000000000	00000
4"	Seamless	000000000	00000
4 1/2"	Seamless	000000000	00000
5"	Seamless	000000000	00000
5 1/2"	Seamless	000000000	00000
6"	Seamless	000000000	00000
6 1/2"	Seamless	000000000	00000
7"	Seamless	000000000	000000
8"	Seamless	000000000	00000
9"	Seamless	000000000	000000
10"	Seamless	000000000	000000
11"	Seamless	000000000	000000
12"	Seamless	000000000	000000
14"	Seamless	00000000	000000
16"	Seamless	00000000	000000
18"	Seamless	0000000	000000
20"	Seamless	00000000	000000
22"	Seamless	00000000	000000
24"	Seamless	0000000	000000
36"	Seamless	0000000	000000
48"	Seamless	0000000	000000
60"	Seamless	00000000	000000
72"	Seamless	0000000	000000
120"	Seamless	00000000	00000000
6 Pipe Size
4"	Seamless	000000000	000000
4 1/2"	Seamless	000000000	000000
5"	Seamless	000000000	000000
5 1/2"	Seamless	000000000	000000
6"	Seamless	000000000	000000
6 1/2"	Seamless	000000000	000000
7"	Seamless	000000000	000000
8"	Seamless	000000000	000000
9"	Seamless	000000000	000000
10"	Seamless	000000000	000000
11"	Seamless	000000000	000000
12"	Seamless	000000000	000000

Low-Pressure Aluminum Threaded Pipe Flanges

Also known as Pressure Class 125 flanges, these are for use in low-pressure applications. Bolt two same-size flanges together with a gasket (sold separately) to create an access point within a line. Flanges are aluminum, which is lightweight with good corrosion resistance.

Reducing flanges allow you to transition your system to a smaller pipe size; attach to a flange with a larger pipe size but with the same flange dimensions.

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

Flanges

Front

Flat Surface on Back

For Use With: Air, Oil, Water
Pressure Class: 125
Specifications Met:
Pipe Size 1-6: ASME B16.1
Fittings: Use Class 150 aluminum
Pipe Nipples and Pipe: Use Schedule 40 aluminum

			Bolt Hole
Pipe Size	Flange OD	For Bolt Dia.	Dia.	No. of	Bolt Circle Dia.	Max. Pressure		Each
NPT
1/2	3 1/2"	1/2"	5/8"	4	2 3/8"	150 psi @ 72° F	000000000	000000
3/4	3 7/8"	1/2"	5/8"	4	2 3/4"	150 psi @ 72° F	000000000	00000
1	4 1/4"	1/2"	5/8"	4	3 1/8"	150 psi @ 72° F	000000000	00000
1 1/4	4 5/8"	1/2"	5/8"	4	3 1/2"	150 psi @ 72° F	000000000	00000
1 1/2	5"	1/2"	5/8"	4	3 7/8"	150 psi @ 72° F	000000000	00000
2	6"	5/8"	3/4"	4	4 3/4"	150 psi @ 72° F	000000000	00000
2 1/2	7"	5/8"	3/4"	4	5 1/2"	150 psi @ 72° F	000000000	00000
3	7 1/2"	5/8"	3/4"	4	6"	150 psi @ 72° F	000000000	00000
4	9"	5/8"	3/4"	8	7 1/2"	150 psi @ 72° F	000000000	000000
6	11"	3/4"	7/8"	8	9 1/2"	150 psi @ 72° F	000000000	000000
8	13 1/2"	3/4"	7/8"	8	11 3/4"	150 psi @ 72° F	000000000	000000

Reducing Flanges

Front

Flat Surface on Back

For Use With: Air, Oil, Water
Pressure Class: 125
Specifications Met: ASME B16.1
Fittings: Use Class 150 aluminum
Pipe Nipples and Pipe: Use Schedule 40 aluminum

				Bolt Hole
Pipe Size	For Flange Pipe Size	Flange OD	For Bolt Dia.	Dia.	No. of	Bolt Circle Dia.	Max. Pressure		Each
NPT
1/2	3/4	3 7/8"	1/2"	5/8"	4	2 3/4"	150 psi @ 72° F	000000000	000000
3/4	1	4 1/4"	1/2"	5/8"	4	3 1/8"	150 psi @ 72° F	000000000	00000
1	1 1/4	4 5/8"	1/2"	5/8"	4	3 1/2"	150 psi @ 72° F	000000000	00000
1 1/4	1 1/2	5"	1/2"	5/8"	4	3 7/8"	150 psi @ 72° F	000000000	00000
1 1/2	2	6"	5/8"	3/4"	4	4 3/4"	150 psi @ 72° F	000000000	00000
2	2 1/2	7"	5/8"	3/4"	4	5 1/2"	150 psi @ 72° F	000000000	00000
2	3	7 1/2"	5/8"	3/4"	4	6"	150 psi @ 72° F	000000000	000000
3	4	9"	5/8"	3/4"	8	7 1/2"	150 psi @ 72° F	000000000	000000
4	6	11"	3/4"	7/8"	8	9 1/2"	150 psi @ 72° F	000000000	000000
6	8	13 1/2"	3/4"	7/8"	8	11 3/4"	150 psi @ 72° F	000000000	000000