Metal Pipe Couplings | McMaster-Carr

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	Pipe Size Pipe Size

1/16
1/8
1/4
3/8
1/2
5/8
3/4
1
1 1/4
1 1/2
2
2 1/2
3
3 1/2
4
5
6
8
10
12

	Thread Type Thread Type

UNJ/UNJF (Tube End)

	Type Type


Connector	Adapter

Pipe	Union

Reducing Adapter	Reducer

Bushing	Cap

Clamp	Flange

Nut	Plug

Stub End

	Material Material

Stainless
Steel

	Connection Style Connection Style

Push to Connect

Quick Disconnect

O-Ring Face Seal

	Shape Shape


Straight	45° Elbow

70° Elbow	90° Elbow

Cap/Plug	Cross

Manifold	Tee

Wye

	For Use With For Use With

Abrasive Materials

Ammonium Hydroxide

Anhydrous Ammonia

Boron Trifluoride

Calcium Chloride

Carbon Monoxide

Carbonyl Sulfide

Deionized Water

Dichlorotetrafluoroethane

Ethylene Glycol

Flammable Gases

Hydraulic Fluid

Hydrochloric Acid

Hydrofluoric Acid

Hydrogen Bromide

Hydrogen Chloride

Hydrogen Iodide

Hydrogen Sulfide

Isopropyl Alcohol

Liquid Nitrogen

Medical Gas Mixtures

Methyl Chloride

Methyl Fluoride

Mineral Spirits

Oxygen Mixtures

Perfluoropropane

Pharmaceuticals

Phosphoric Acid

Plastic Pellets

Propylene Glycol

Refrigerant Gases

Silicon Tetrafluoride

Sodium Carbonate

Sodium Hydroxide

Sulfur Hexafluoride

Sulfur Tetrafluoride

Trifluoroethane

	Gender Gender

	Threading Threading

Threaded on Both Ends

Threaded on One End

	System of Measurement System of Measurement

	Length Length

	Connection Type Connection Type


Pipe	Hose

Tube

	Schedule Schedule


10	40

80	160

XXH

	For Tube OD For Tube OD

	Maximum Pressure Maximum Pressure

0.5 psi @ 72° F

15 psi @ 72° F

25 psi @ 72° F

30 psi @ 72° F

45 psi @ 72° F

50 psi @ 72° F

70 psi @ 72° F

75 psi @ 72° F

90 psi @ 72° F

100 psi @ 72° F

110 psi @ 72° F

120 psi @ 72° F

125 psi @ 72° F

130 psi @ 72° F

140 psi @ 72° F

145 psi @ 72° F

150 psi @ 72° F

160 psi @ 72° F

170 psi @ 72° F

175 psi @ 72° F

200 psi @ 72° F

220 psi @ 72° F

230 psi @ 72° F

250 psi @ 72° F

270 psi @ 72° F

285 psi @ 72° F

290 psi @ 72° F

300 psi @ 72° F

345 psi @ 72° F

350 psi @ 72° F

360 psi @ 72° F

400 psi @ 72° F

435 psi @ 72° F

450 psi @ 72° F

500 psi @ 72° F

530 psi @ 72° F

550 psi @ 72° F

580 psi @ 72° F

600 psi @ 72° F

610 psi @ 72° F

650 psi @ 72° F

700 psi @ 72° F

750 psi @ 72° F

790 psi @ 72° F

800 psi @ 72° F

870 psi @ 72° F

900 psi @ 72° F

1,000 psi @ 72° F

1,080 psi @ 72° F

1,100 psi @ 72° F

1,150 psi @ 72° F

1,200 psi @ 72° F

1,250 psi @ 72° F

1,300 psi @ 72° F

1,400 psi @ 72° F

1,450 psi @ 72° F

1,500 psi @ 72° F

1,600 psi @ 72° F

1,700 psi @ 72° F

1,800 psi @ 72° F

1900 psi @ 72° F

2,000 psi @ 72° F

2,100 psi @ 72° F

2,200 psi @ 72° F

2,250 psi @ 72° F

2,300 psi @ 72° F

2,350 psi @ 72° F

2,400 psi @ 72° F

2,500 psi @ 72° F

2,600 psi @ 72° F

2,700 psi @ 72° F

2,800 psi @ 72° F

2,900 psi @ 72° F

3,000 psi @ 72° F

3,100 psi @ 72° F

3,200 psi @ 72° F

3,250 psi @ 72° F

3,300 psi @ 72° F

3,500 psi @ 72° F

3,600 psi @ 72° F

3,700 psi @ 72° F

3,750 psi @ 72° F

3,800 psi @ 72° F

3,900 psi @ 72° F

4,000 psi @ 72° F

4,100 psi @ 72° F

4,200 psi @ 72° F

4,250 psi @ 72° F

4,300 psi @ 72° F

4,350 psi @ 72° F

4,400 psi @ 72° F

4,500 psi @ 72° F

4,600 psi @ 72° F

4,650 psi @ 72° F

4,700 psi @ 72° F

4,800 psi @ 72° F

4,900 psi @ 72° F

5,000 psi @ 72° F

5,100 psi @ 72° F

5,200 psi @ 72° F

5,250 psi @ 72° F

5,300 psi @ 72° F

5,400 psi @ 72° F

5,450 psi @ 72° F

5,500 psi @ 72° F

5,600 psi @ 72° F

5,800 psi @ 72° F

6,000 psi @ 72° F

6,100 psi @ 72° F

6,150 psi @ 72° F

6,200 psi @ 72° F

6,400 psi @ 72° F

6,500 psi @ 72° F

6,600 psi @ 72° F

6,700 psi @ 72° F

6,800 psi @ 72° F

7,000 psi @ 72° F

7,100 psi @ 72° F

7,200 psi @ 72° F

7,300 psi @ 72° F

7,500 psi @ 72° F

7,700 psi @ 72° F

8,000 psi @ 72° F

9,000 psi @ 72° F

9,100 psi @ 72° F

9,700 psi @ 72° F

10,000 psi @ 72° F

11,000 psi @ 72° F

11,600 psi @ 72° F

15,000 psi @ 72° F

3,000 psi @ 100° F

	Specifications Met Specifications Met

3-A Sanitary Certified

AN

ANSI

ANSI/ASME

ANSI/MSS

AWWA

CISPI

CSA

DIN

FDA Compliant

Fed. Spec.

FM

ICC

International Fuel Gas
Code

ISO

Mil. Spec.

MSS

National Standard
Plumbing Code

NSF/ANSI

SAE

UL

Uniform Mechanical Code

UPC

	Finish Finish

Black Nickel Plated

Black Zinc Plated

	For Pipe Material For Pipe Material

Stainless
Steel

	ID ID

	OD OD

	For Hose ID For Hose ID

5/8" to 3/4"

	Coupling Size Coupling Size

2
2 1/2
3
4
5
6
8

	For Tube Material For Tube Material

Rubber

Stainless
Steel

Nickel

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20,234 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.

More

Pipe, Tubing, Hose, and Fittings

Iron and Steel Pipe and Pipe Fittings

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Iron and steel are more economical than stainless steel. They are compatible and can be used interchangeably.

Stainless Steel Pipe and Pipe Fittings

Stainless steel has very good to excellent corrosion resistance.

Brass and Bronze
Pipe and Pipe Fittings

Brass and bronze have good corrosion resistance. They are often used in drinking water and plumbing applications. Brass and bronze are compatible and can be used interchangeably.

Titanium Threaded Pipe Fittings

Titanium Threaded Pipe Fittings

Titanium has similar strength to steel, but is approximately 40% lighter. It has better corrosion resistance than most stainless steel alloys and can handle corrosive substances, such as salt water and acids.

Aluminum Pipe and Pipe Fittings

Aluminum has good corrosion resistance and is lightweight.

Copper-Nickel Pipe and Pipe Fittings

Copper-nickel has excellent resistance to stress cracking and has better corrosion resistance than most stainless steel alloys. It can stand up to corrosive environments, such as salt water applications.

Clamp-On Connectors

Clamp-On Connectors

Use these to connect plastic or metal pipe of the same or different materials. Tighten the bands to form a strong seal.

Plastic Pipe and Pipe Fittings

Plastic pipe and pipe fittings are lighter in weight than metal pipe and pipe fittings. They are typically for low- to medium-pressure applications up to 1,000 psi.

Hose and Hose Fittings

Tubing and Tube Fittings

Flow Sights

Flow Sights

Flow Sights

Visually confirm flow and inspect your process media.

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The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)