Couplings for Argon | 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

Argon

	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

	Shape Shape

	Straight

	Material Material

Brass

Stainless Steel

	Gender Gender

Female

Male

	Maximum Pressure Maximum Pressure

	Connection Style Connection Style

	System of Measurement System of Measurement

Inch

	Length Length

	Connection Type Connection Type


Pipe	Hose

Tube

	Body Shape Body Shape

	Hex

	OD OD

	Maximum Steam Pressure Maximum Steam Pressure

1,500 psi @ 300° F

	Threading Threading

	Fully Threaded

	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

	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

	Hex Width Hex Width

	Specifications Met Specifications Met

ASME B31.1

ASME B31.3

ASME B1.20.1

	Fabrication Fabrication

Machined

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

REACH Compliant

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161 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.

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.

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.

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 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.

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.

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.