Couplings for Nitrogen | McMaster-Carr

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	Type Type


Connector	Adapter

Pipe	Reducer

Reducing Adapter	Bushing

Nut

	Pipe Size Pipe Size

	Thread Type Thread Type

	For Use With For Use With	Show

Nitrogen

	For Use With For Use With	Hide

Warning: Products have one, but not necessarily all, of the selected characteristics.

Dichlorotetrafluoroethane

Hydrochloric Acid (30%)

Silicon Tetrafluoride

Sludge

Soap Solutions

Sodium Carbonate

Sodium Carbonate
(20% in Water)

Tungsten Hexafluoride

	Material Material

	Shape Shape

	Straight
	Tee
	90° Elbow

	Gender Gender

Female

Male

	Maximum Pressure Maximum Pressure

	Connection Style Connection Style

	System of Measurement System of Measurement

Inch

Metric

	Length Length

	Connection Type Connection Type


Pipe	Hose

Tube

	Thread Size Thread Size

	CGA Number CGA Number

022
032
033
170
180
320
346
350
500
510
540
555
580
590
677
680
695
702
703

	Body Shape Body Shape

	Hex

	OD OD

	Threading Threading

Fully Threaded

Threaded on Both Ends

Threaded on One End

	For Tube OD For Tube OD

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

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

DFARS Specialty Metals
COTS-Exempt

	Connects To Connects To

Tank

Regulator

	Maximum Steam Pressure Maximum Steam Pressure

1,500 psi @ 300° F

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

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318 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.

Compact Extreme-Pressure
Steel Threaded Pipe Fittings

These fittings are strong enough to handle extreme pressures, yet small enough to fit into cramped spaces.

Super-Thick-Wall Steel Threaded Pipe Nipples and Pipe

Typically used with extreme-pressure iron and steel threaded pipe fittings. Also known as Schedule XXH.

Thick-Wall Galvanized Iron and Steel
Threaded Pipe Nipples and Pipe

Typically used with medium-pressure galvanized iron and steel threaded pipe fittings. Also known as Schedule 80.

Precision Extreme-Pressure
Brass Threaded Pipe Fittings

Also known as instrumentation fittings, these have the most precise threads and the tightest tolerances of all the brass pipe fittings we offer.

Precision Extreme-Pressure Brass
Threaded Pipe Nipples and Pipe

Typically used with precision extreme-pressure brass and bronze threaded pipe fittings.

Compressed Gas Hose Fittings

Threaded Hose Fittings for Compressed Gas

Use these CGA fittings to connect welding hose to pressure regulators and torches.

Barbed Hose Fittings for Compressed Gas

Commonly used in low-pressure welding applications, these fittings connect downstream of your pressure regulator. Slide the barbed end into hose and secure with a crimp-on hose ferrule.

High-Pressure Threaded Fittings for Compressed Gas

Designed to handle high-pressure welding applications, these CGA fittings are commonly used to connect pressure regulators to compressed gas tanks or cylinders.

Nuts for High-Pressure Nipples for Compressed Gas

These nuts attach to high-pressure nipples for compressed gas so you can connect your tank to the inlet of a pressure regulator.

High-Pressure Nipples for Compressed Gas

Commonly used in high-pressure welding applications, these nipples connect your tank to the inlet of a pressure regulator. One side has a threaded pipe end and the other side has a rounded end that sits inside a threaded nut to make a threaded connection.

Tubing and Tube Fittings

Push-to-Connect Fittings for Plastic Tubing—High-Purity

Also known as instant fittings, they connect to tubing with a push, and an internal gripping ring and O-ring hold the tubing tight. Use in applications up to 140 psi.

Vibration-Resistant Compression
Fittings for Stainless Steel Tubing

Instead of a metal sleeve (ferrule), these fittings have a rubber sleeve that cushions tubing and absorbs vibration to maintain a tight seal, even when connected to large pumps.

Nuts for Vibration-Resistant Compression
Fittings for Stainless Steel Tubing

Pair these nuts with vibration-resistant compression sleeves and fittings for a strong seal on stainless steel tubing.

Ultra-High-Polish Gasket Fittings
for Stainless Steel Tubing

Polished to a 15 Ra and under finish, these fittings have a mirror smooth interior. They are also known as ultra-high-purity fittings.

Ultra-High-Polish Gasket Adapters
for Stainless Steel Tubing

Vibration-Resistant Ultra-High-Polish
Gasket Fittings for Stainless Steel Tubing

Fittings have two anti-torque rings that compress the gasket to prevent rotation and reduce particle generation in high-vibration applications.

Through-Wall Fittings for High-Vacuum Chambers

Transfer liquids and gasses into high-vacuum chambers with these assembled fittings, also known as feedthroughs.