Schedule 160 Unions | McMaster-Carr

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	Pipe Size Pipe Size

1/8

	Thread Type Thread Type

NPT

	Type Type	Show

Union

	Type Type	Hide

	Material Material

Steel

	Finish Finish

Galvanized

Phosphate Coated

Zinc-Phosphate Coated

	For Use With For Use With

	Class Class

3000

	Connection Style Connection Style

Threaded

	Maximum Pressure Maximum Pressure

3,000 psi @ 72° F

3,000 psi @ 100° F

	For Pipe Material For Pipe Material

Galvanized Steel

Steel

	Shape Shape

	Straight

	For Pipe Schedule For Pipe Schedule	Show

160

	For Pipe Schedule For Pipe Schedule	Hide

160

XXH

	Body Shape Body Shape


Hex	Hex with Lugs

	Maximum Steam Pressure Maximum Steam Pressure

300 psi @ 360° F

1,500 psi @ 700° F

	Gender Gender

Female

	Connection Type Connection Type

	Pipe

	Length Length

	Specifications Met Specifications Met

ASME

ASTM

MSS

	Dash Size Dash Size

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

DFARS Specialty Metals
COTS-Exempt

	Hex Width Hex Width

	Fabrication Fabrication

Forged

	Gasket Material Gasket Material

Graphite-Filled 304 Stainless
Steel

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35 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.

High-Pressure Iron and Steel Threaded Pipe Fittings

These fittings can stand up to high-pressure applications. Use them in noncorrosive environments.

Union connectors separate into three pieces so you can access your line without unthreading pipe connections. Union connectors with gasket provide extra leak protection.

Phosphate-coated and zinc-phosphate-coated fittings offer some corrosion resistance, but aren't intended for corrosive environments.

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

Union Straight Connectors

Exploded View

For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
Class: 3000
Specifications Met: MSS SP-83, ASME B1.20.1, ASTM A105
Pipe Nipples and Pipe: Use Schedule 160 steel
Flanges: Use Class 1500 steel

NPT Female
Pipe Size	Dash Size	Max. Pressure	Max. Steam Pressure	Material		Each
1/8	02	3,000 psi @ 72° F	300 psi @ 360° F	Zinc-Phosphate-Coated Steel	00000000	000000
1/4	04	3,000 psi @ 72° F	300 psi @ 360° F	Zinc-Phosphate-Coated Steel	0000000	00000
3/8	06	3,000 psi @ 72° F	300 psi @ 360° F	Zinc-Phosphate-Coated Steel	0000000	00000
1/2	08	3,000 psi @ 72° F	300 psi @ 360° F	Zinc-Phosphate-Coated Steel	0000000	00000
3/4	12	3,000 psi @ 72° F	300 psi @ 360° F	Zinc-Phosphate-Coated Steel	0000000	00000
1	16	3,000 psi @ 72° F	300 psi @ 360° F	Zinc-Phosphate-Coated Steel	0000000	00000
1 1/4	20	3,000 psi @ 72° F	300 psi @ 360° F	Zinc-Phosphate-Coated Steel	0000000	00000
1 1/2	24	3,000 psi @ 72° F	300 psi @ 360° F	Zinc-Phosphate-Coated Steel	0000000	00000
2	32	3,000 psi @ 72° F	300 psi @ 360° F	Zinc-Phosphate-Coated Steel	0000000	00000
2 1/2	40	3,000 psi @ 72° F	300 psi @ 360° F	Zinc-Phosphate-Coated Steel	00000000	000000
3	48	3,000 psi @ 72° F	300 psi @ 360° F	Zinc-Phosphate-Coated Steel	00000000	000000

Union Straight Connectors with Gasket

Exploded View

For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
Specifications Met: MSS SP-83, ASTM A105
Pipe Nipples and Pipe: Use Schedule 160 steel
Flanges: Use Class 1500 steel

NPT Female
Pipe Size	Dash Size	Max. Pressure	Max. Steam Pressure	Material	Gasket Material		Each
1/2	08	3,000 psi @ 100° F	1,500 psi @ 700° F	Phosphate-Coated Steel	Graphite-Filled 304 Stainless Steel	0000000	000000
3/4	12	3,000 psi @ 100° F	1,500 psi @ 700° F	Phosphate-Coated Steel	Graphite-Filled 304 Stainless Steel	0000000	00000
1	16	3,000 psi @ 100° F	1,500 psi @ 700° F	Phosphate-Coated Steel	Graphite-Filled 304 Stainless Steel	0000000	00000
1 1/4	20	3,000 psi @ 100° F	1,500 psi @ 700° F	Phosphate-Coated Steel	Graphite-Filled 304 Stainless Steel	0000000	000000
1 1/2	24	3,000 psi @ 100° F	1,500 psi @ 700° F	Phosphate-Coated Steel	Graphite-Filled 304 Stainless Steel	0000000	000000
2	32	3,000 psi @ 100° F	1,500 psi @ 700° F	Phosphate-Coated Steel	Graphite-Filled 304 Stainless Steel	0000000	000000

Union Straight Connectors with Lugs

Exploded View

For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
Class: 3000
Specifications Met: MSS SP-83, ASME B1.20.1, ASTM A105
Pipe Nipples and Pipe: Use Schedule 160 steel
Flanges: Use Class 1500 steel

NPT Female
Pipe Size	Dash Size	Max. Pressure	Max. Steam Pressure	Material		Each
1/2	08	3,000 psi @ 72° F	300 psi @ 360° F	Zinc-Phosphate-Coated Steel	00000000	000000
3/4	12	3,000 psi @ 72° F	300 psi @ 360° F	Zinc-Phosphate-Coated Steel	00000000	00000
1	16	3,000 psi @ 72° F	300 psi @ 360° F	Zinc-Phosphate-Coated Steel	00000000	00000
1 1/4	20	3,000 psi @ 72° F	300 psi @ 360° F	Zinc-Phosphate-Coated Steel	00000000	000000
1 1/2	24	3,000 psi @ 72° F	300 psi @ 360° F	Zinc-Phosphate-Coated Steel	00000000	000000
2	32	3,000 psi @ 72° F	300 psi @ 360° F	Zinc-Phosphate-Coated Steel	00000000	000000
2 1/2	40	3,000 psi @ 72° F	300 psi @ 360° F	Zinc-Phosphate-Coated Steel	00000000	000000
3	48	3,000 psi @ 72° F	300 psi @ 360° F	Zinc-Phosphate-Coated Steel	00000000	000000
4	64	3,000 psi @ 72° F	300 psi @ 360° F	Zinc-Phosphate-Coated Steel	00000000	000000

High-Pressure Galvanized Steel Threaded Pipe Fittings

A galvanized finish gives these fittings better corrosion resistance than our plain steel high-pressure fittings. Also known as Class 3000 fittings, they have excellent strength to handle high-pressure applications.

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

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

Union Straight Connectors

Exploded View

For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
Class: 3000
Specifications Met: ASME B1.20.1, ASTM A105, MSS SP-83
Pipe Nipples and Pipe: Use Schedule 160 steel

NPT Female
Pipe Size	Dash Size	Max. Pressure	Max. Steam Pressure		Each
1/8	02	3,000 psi @ 72° F	300 psi @ 360° F	00000000	000000
1/4	04	3,000 psi @ 72° F	300 psi @ 360° F	00000000	00000
3/8	06	3,000 psi @ 72° F	300 psi @ 360° F	00000000	00000
1/2	08	3,000 psi @ 72° F	300 psi @ 360° F	00000000	00000
3/4	12	3,000 psi @ 72° F	300 psi @ 360° F	00000000	00000
1	16	3,000 psi @ 72° F	300 psi @ 360° F	00000000	00000
1 1/4	20	3,000 psi @ 72° F	300 psi @ 360° F	00000000	00000
1 1/2	24	3,000 psi @ 72° F	300 psi @ 360° F	00000000	00000
2	32	3,000 psi @ 72° F	300 psi @ 360° F	00000000	00000