Nipples for Fuel Gases | McMaster-Carr

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	Type Type


Adapter	Connector

Nut

	System of Measurement System of Measurement

Inch

	Thread Size Thread Size

	Thread Type Thread Type

NGO

NPT

UN/UNF (CGA)

	For Use With For Use With	Show

Fuel Gases

	For Use With For Use With	Hide

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

Dichlorotetrafluoroethane

Silicon Tetrafluoride

Tungsten Hexafluoride

	CGA Number CGA Number

	Thread Direction Thread Direction

Right Hand

Left Hand

	Connection Style Connection Style

Threaded

Barbed

Quick Disconnect

	Material Material

Brass

	For Hose ID For Hose ID

	Connects To Connects To

	Shape Shape

	Straight

	Gender Gender

Male

Female

	Connection Type Connection Type


Pipe	Hose

	Gas Fitting Size Gas Fitting Size

	Maximum Pressure Maximum Pressure

200 psi @ 72° F

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

DFARS Specialty Metals
COTS-Exempt

	Minimum Temperature Minimum Temperature

Not Rated

	Maximum Temperature Maximum Temperature

Less than 200° F

	For Hose Type For Hose Type

Welding

	Length Length

	For Hose Material For Hose Material

Rubber

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

RoHS Compliant

RoHS Compliant with
Exemptions

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26 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.

Threaded Hose Fittings for Compressed Gas

Use these fittings to connect welding hose to pressure regulators and torches. They are also known as CGA (Compressed Gas Association) fittings. Fittings are brass for good corrosion resistance.

Fittings with left-hand threads are identified with a notch in the nut.

Note: Fittings have a CGA number that corresponds to a specific type of gas. Choose a fitting with the same CGA number as your tank and other system components.

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

Straight Adapters, Female Hose × Male Hose

Maximum Pressure: 200 psi @ 72° F
Maximum Temperature: 120° F

Female Hose Connection					Male Hose Connection
CGA Number	Gas Fitting Size	Thread Size	Thread Type	Thread Direction	CGA Number	Gas Fitting Size	Thread Size	Thread Type	Thread Direction	For Use With		Each
Brass
021	A	3/8"-24	UN/UNF (CGA)	Left Hand	023	B	9/16"-18	UN/UNF (CGA)	Left Hand	Acetylene, Butane, Fuel Gases, LP Gas, Natural Gas, Propane	0000000	00000
023	B	9/16"-18	UN/UNF (CGA)	Left Hand	021	A	3/8"-24	UN/UNF (CGA)	Left Hand	Acetylene, Butane, Fuel Gases, LP Gas, Natural Gas, Propane	0000000	0000

Straight Adapters, Female Hose × Male Pipe

Maximum Pressure: 200 psi @ 72° F
Maximum Temperature: 120° F

Female Hose Connection					Male Pipe Connection
CGA Number	Gas Fitting Size	Thread Size	Thread Type	Thread Direction	Pipe Size	Thread Type	Thread Direction	For Use With		Each
Brass
023	B	9/16"-18	UN/UNF (CGA)	Left Hand	1/4	NPT	Right Hand	Acetylene, Butane, Fuel Gases, LP Gas, Natural Gas, Propane	0000000	000000

Straight Adapters, Male Hose × Male Pipe

Maximum Pressure: 200 psi @ 72° F
Maximum Temperature: 120° F

Male Hose Connection					Male Pipe Connection
CGA Number	Gas Fitting Size	Thread Size	Thread Type	Thread Direction	Pipe Size	Thread Type	Thread Direction	For Use With		Each
Brass
021	A	3/8"-24	UN/UNF (CGA)	Left Hand	1/4	NPT	Right Hand	Acetylene, Butane, Fuel Gases, LP Gas, Natural Gas, Propane	000000000	00000
023	B	9/16"-18	UN/UNF (CGA)	Left Hand	1/8	NPT	Right Hand	Acetylene, Butane, Fuel Gases, LP Gas, Natural Gas, Propane	000000000	0000
023	B	9/16"-18	UN/UNF (CGA)	Left Hand	1/4	NPT	Right Hand	Acetylene, Butane, Fuel Gases, LP Gas, Natural Gas, Propane	0000000	0000
023	B	9/16"-18	UN/UNF (CGA)	Left Hand	3/8	NPT	Right Hand	Acetylene, Butane, Fuel Gases, LP Gas, Natural Gas, Propane	000000000	0000

Straight Connectors, Male Hose

Maximum Pressure: 200 psi @ 72° F
Maximum Temperature: 120° F

Brass
CGA Number	Gas Fitting Size	Thread Size	Thread Type	Thread Direction	For Use With		Each
021	A	3/8"-24	UN/UNF (CGA)	Left Hand	Acetylene, Butane, Fuel Gases, LP Gas, Natural Gas, Propane	000000	00000
023	B	9/16"-18	UN/UNF (CGA)	Left Hand	Acetylene, Butane, Fuel Gases, LP Gas, Natural Gas, Propane	000000	0000

Threaded Hose-to-Propane-Torch Adapters for Compressed Gas

Maximum Pressure: 200 psi @ 72° F
Maximum Temperature: 120° F

These adapters allow you to connect a hose to a propane torch. Fittings are also known as CGA (Compressed Gas Association) fittings. They are brass for good corrosion resistance. Fittings have left-hand threads that are identified with a notch in the nut.

Note: Fittings have a CGA number that corresponds to a specific type of gas. Choose a fitting with the same CGA number as your tank and other system components.

CGA Number		Hose Connection			Torch Connection
Hose	Torch	Thread Size	Thread Type	Thread Direction	Thread Size	Thread Type	Thread Direction	For Use With		Each
Brass
023	600	9/16"-18	UN/UNF (CGA)	Left Hand	1"-20	UN/UNF (CGA)	Right Hand	Acetylene, Butane, Fuel Gases, LP Gas, Natural Gas, Propane	0000000	000000

Hose Crimping Tool and Fitting Sets for Compressed Gas

Sets contain a crimping tool and a variety of fittings, nuts, and ferrules so you can connect pressure regulators, torches, and other components of your welding system. Fittings are also known as CGA (Compressed Gas Association) fittings. They are brass for good corrosion resistance.

Barbed adapters let you adapt to a threaded end so you can connect welding hose to pressure regulators or torches. They consist of a barbed shaft with a rounded end that sits inside a threaded nut so you can make a threaded hose connection.

Barbed connectors are also known as hose menders and splicers. Use them to connect lengths of hose or to repair damaged hose. Slide the barbed end into welding hose and use a hose ferrule and the crimping tool to secure the fitting to hose.

Threaded connectors let you attach threaded welding hose to pressure regulators and torches.

Fittings with left-hand threads are identified with a notch in the nut.

Note: Fittings have a CGA number that corresponds to a specific type of gas. Choose a fitting with the same CGA number as your tank and other system components.

Brass
For Hose ID	No. of Pieces	Includes	Max. Pressure	For Use With		Each
3/16", 1/4"	93	Crimping Tool Eight barbed hose adapters for 3/16" hose ID (use with A-size nuts) Six barbed hose adapters for 3/16" hose ID (use with B-size nuts) Ten barbed hose adapters for 1/4" hose ID (use with B-size nuts) Two barbed hose connectors for 3/16" hose ID Four barbed hose connectors for 1/4" hose ID One A-size 3/8"-24 male right-hand threaded connector (CGA-020) One A-size 3/8"-24 male left-hand threaded connector (CGA-021) One B-size 9/16"-18 male right-hand threaded connector (CGA-022) One B-size 9/16"-18 male left-hand threaded connector (CGA-023) Four A-size 3/8"-24 right-hand threaded nuts (CGA-020) Four A-size 3/8"-24 left-hand threaded nuts (CGA-021) Eight B-size 9/16"-18 female right-hand threaded nuts (CGA-022) Eight B-size 9/16"-18 female left-hand threaded nuts (CGA-023) Twelve ferrules with 0.45" hose end ID Ten ferrules with 0.562" hose end ID Twelve ferrules with 0.593" hose end ID	200 psi @ 72° F	Acetylene, Butane, Fuel Gases, LP Gas, Natural Gas, Oxygen, Propane	0000000	0000000
5/16", 3/8"	71	Crimping Tool Eight barbed hose adapters for 5/16" hose ID (use with B-size nuts) Eight barbed hose adapters for 3/8" hose ID (use with B-size nuts) Two barbed hose connectors for 5/16" hose ID Two barbed hose connectors for 3/8" hose ID One B-size 9/16"-18 male right-hand threaded connector (CGA-022) One B-size 9/16"-18 male left-hand threaded connector (CGA-023) Eight B-size 9/16"-18 female right-hand threaded nuts (CGA-022) Eight B-size 9/16"-18 female left-hand threaded nuts (CGA-023) Eight ferrules with 0.625" hose end ID Eight ferrules with 0.656" hose end ID Six ferrules with 0.687" hose end ID Eight ferrules with 0.718" hose end ID	200 psi @ 72° F	Acetylene, Butane, Fuel Gases, LP Gas, Natural Gas, Oxygen, Propane	0000000	000000

Threaded Hose-to-Propane-Tank Adapters for Compressed Gas

Maximum Pressure: 200 psi @ 72° F
Maximum Temperature: 120° F

These adapters have a male threaded end that connects to a propane tank and a male threaded end that connects to a hose. Fittings are also known as CGA (Compressed Gas Association) fittings. They are brass for good corrosion resistance. Fittings have left-hand threads that are identified with a notch in the nut.

Note: Fittings have a CGA number that corresponds to a specific type of gas. Choose a fitting with the same CGA number as your tank and other system components.

CGA Number		Hose Connection			Tank Connection
Hose	Tank	Thread Size	Thread Type	Thread Direction	Thread Size	Thread Type	Thread Direction	For Use With		Each
Brass
023	510	9/16"-18	UN/UNF (CGA)	Left Hand	0.880"-14	NGO	Left Hand	Acetylene, Butane, Fuel Gases, LP Gas, Natural Gas, Propane	0000000	000000

Barbed Hose Fittings for Compressed Gas

Commonly used in low-pressure welding applications, these fittings connect downstream of your tank and pressure regulator. Slide the barbed end into rubber hose and secure with a crimp-on hose ferrule. Fittings are brass for good corrosion resistance.

Adapters let you adapt to a threaded end so you can connect welding hose to torches or pressure regulators. They consist of a barbed shaft with a rounded end that sits inside a threaded CGA nut (sold separately) so you can make a threaded hose connection. Adapters with a spiral barbed end twist into hose for an easier installation than adapters with a standard barb.

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

Straight Adapters, Barbed Hose × Threaded Hose

Maximum Pressure: 200 psi @ 72° F
Maximum Temperature: 120° F
Attachment Type: Use Crimp-On Hose Ferrules

Adapters						Nuts with Right-Hand Threads			Nuts with Left-Hand Threads
For Hose ID	For CGA Number	Gas Fitting Size	For Use With		Each	CGA Number		Each	CGA Number		Each
Brass
3/16"	020, 021	A	Acetylene, Butane, Fuel Gases, LP Gas, Natural Gas, Oxygen, Propane	000000	00000	020	0000000	00000	__	000000	00
3/16"	022, 023	B	Acetylene, Butane, Fuel Gases, LP Gas, Natural Gas, Oxygen, Propane	000000	000	022	000000	000	023	000000	00000
1/4"	022, 023	B	Acetylene, Butane, Fuel Gases, LP Gas, Natural Gas, Oxygen, Propane	000000	000	022	000000	000	023	000000	000
5/16"	022, 023	B	Acetylene, Butane, Fuel Gases, LP Gas, Natural Gas, Oxygen, Propane	000000	0000	022	000000	000	023	000000	000
3/8"	022, 023	B	Acetylene, Butane, Fuel Gases, LP Gas, Natural Gas, Oxygen, Propane	000000	0000	022	000000	000	023	000000	000

Straight Adapters, Spiral Barbed Hose × Threaded Hose

Maximum Pressure: 200 psi @ 72° F
Maximum Temperature: 120° F
Attachment Type: Use Crimp-On Hose Ferrules

Adapters						Nuts with Right-Hand Threads			Nuts with Left-Hand Threads
For Hose ID	For CGA Number	Gas Fitting Size	For Use With		Each	CGA Number		Each	CGA Number		Each
Brass
3/16"	022, 023	B	Acetylene, Butane, Fuel Gases, LP Gas, Natural Gas, Oxygen, Propane	0000000	00000	022	000000	00000	023	000000	00000
1/4"	022, 023	B	Acetylene, Butane, Fuel Gases, LP Gas, Natural Gas, Oxygen, Propane	0000000	0000	022	000000	000	023	000000	000

Quick-Disconnect Hose Couplings for Compressed Gas

Use these couplings to quickly link and unlink welding hoses, torches, and pressure regulators. They consist of a plug and socket that are sold together as a set of two—you’ll get one right-hand connection for oxygen and one left-hand connection for fuel gas. The connections are noninterchangeable and color coded so you can’t mix lines. The male threaded ends attach to threaded welding hose, and the female threaded ends attach to a torch or pressure regulator. To connect couplings, push the plug into the socket; the sleeve on the socket has a spring-loaded lock for gas-tight connections. To disconnect, pull back on the socket sleeve and twist to release the plug. The sockets have a shut-off valve that stops the flow when the coupling is separated so gas won’t leak from the line. The sockets also have a built-in check valve to prevent gas backflow. Couplings are also known as CGA (Compressed Gas Association) couplings. They are brass for good corrosion resistance.

Couplings with left-hand threads are identified with a notch in the nut.

Note: Couplings have a CGA number that corresponds to a specific type of gas. Make sure the CGA number of the coupling matches the CGA number of your tank and other system components.

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

Brass Plug and Socket Sets, Male Hose × Female Torch

Maximum Pressure: 200 psi @ 72° F
Maximum Temperature: 120° F
Specifications Met: OSHA 29 CFR 1915.55, OSHA 29 CFR 1917.152, OSHA 29 CFR 1926.350, UL Listed

Includes	Gas Fitting Size	Thread Size	Thread Type	Thread Direction	For Use With		Each
One CGA 022 Coupling Adapter (Male Hose Plug × Female Torch Socket) One CGA 023 Coupling Adapter (Male Hose Plug × Female Torch Socket)	B	9/16"-18	UN/UNF (CGA)	Right Hand (CGA 022), Left Hand (CGA 023)	Acetylene, Butane, Fuel Gases, LP Gas, Natural Gas, Oxygen, Propane	000000	000000

Brass Plug and Socket Sets, Male Hose × Female Regulator

Maximum Pressure: 200 psi @ 72° F
Maximum Temperature: 120° F
Specifications Met: OSHA 29 CFR 1915.55, OSHA 29 CFR 1917.152, OSHA 29 CFR 1926.350, UL Listed

Includes	Gas Fitting Size	Thread Size	Thread Type	Thread Direction	For Use With		Each
One CGA 022 Coupling Adapter (Male Hose Plug × Female Regulator Socket) One CGA 023 Coupling Adapter (Male Hose Plug × Female Regulator Socket)	B	9/16"-18	UN/UNF (CGA)	Right Hand (CGA 022), Left Hand (CGA 023)	Acetylene, Butane, Fuel Gases, LP Gas, Natural Gas, Oxygen, Propane	000000	0000000

Brass Plug and Socket Sets, Male Hose × Male Hose

Maximum Pressure: 200 psi @ 72° F
Maximum Temperature: 120° F
Specifications Met: OSHA 29 CFR 1915.55, OSHA 29 CFR 1917.152, OSHA 29 CFR 1926.350, UL Listed

Includes	Gas Fitting Size	Thread Size	Thread Type	Thread Direction	For Use With		Each
One CGA 022 Coupling Adapter (Male Hose Plug × Male Hose Socket) One CGA 023 Coupling Adapter (Male Hose Plug × Male Hose Socket)	B	9/16"-18	UN/UNF (CGA)	Right Hand (CGA 022), Left Hand (CGA 023)	Acetylene, Butane, Fuel Gases, LP Gas, Natural Gas, Oxygen, Propane	000000	0000000