0.960"-14 Adapters | McMaster-Carr

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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.

Nuts for High-Pressure Nipples for Compressed Gas

Slide a high-pressure hose nipple for compressed gas into one of these nuts to connect a pipe to the inlet of a pressure regulator. They are also known as CGA (Compressed Gas Association) nuts and inlet nuts.

Brass nuts have good corrosion resistance and are softer than 316 stainless steel nuts, so they're easier to thread together. Chrome-plated brass nuts have comparable corrosion and wear resistance to aluminum-plated brass nuts, and have a bright, shiny appearance.

Nuts with a plastic grip can be tightened by hand instead of with a wrench.

Nuts with left-hand threads are identified with a notch.

Note: Nuts have a CGA, BS, or DIN number that corresponds to a specific type of gas. Choose a nut with the same number as your tank and other system components.

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

Male

Male Nut

Maximum Pressure: See table
Maximum Temperature: 120° F, except DIN 477 No. 12: 250° F

Brass
Number	Thread Size	Thread Type	Thread Direction	Max. Pressure	For Use With		Each
CGA 580	0.960"-14	NGO	Right Hand	3,000 psi @ 72° F	Argon, Helium, Krypton, Neon, Nitrogen, Xenon	000000000	00000
CGA 590	0.960"-14	NGO	Left Hand	3,000 psi @ 72° F	Sulfur Hexafluoride	000000000	0000
Brass with Plastic Grip
CGA 580	0.960"-14	NGO	Right Hand	3,000 psi @ 72° F	Argon, Helium, Krypton, Neon, Nitrogen, Xenon	000000000	00000
CGA 590	0.960"-14	UN/UNF (CGA)	Left Hand	3,000 psi @ 72° F	Sulfur Hexafluoride	00000000	00000
Chrome-Plated Brass
CGA 580	0.960"-14	NGO	Right Hand	3,000 psi @ 72° F	Argon, Helium, Krypton, Neon, Nitrogen, Xenon	000000000	00000
CGA 590	0.960"-14	NGO	Left Hand	3,000 psi @ 72° F	Sulfur Hexafluoride	000000000	00000

High-Pressure Threaded Fittings for Compressed Gas

Designed to handle high-pressure welding applications, these fittings are commonly used to connect pressure regulators to compressed gas tanks or cylinders. Fittings are also known as CGA (Compressed Gas Association) fittings. They 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.

Female Tank × Female Regulator

Maximum Pressure: See table
Maximum Temperature: 120° F

CGA Number		Tank Connection			Regulator Connection
Tank	Regulator	Thread Size	Thread Type	Thread Direction	Thread Size	Thread Type	Thread Direction	Max. Pressure	For Use With		Each
Brass
320	580	0.830"-14	NGO	Right Hand	0.960"-14	NGO	Right Hand	3,000 psi @ 72° F	Argon, Carbon Dioxide, Helium, Krypton, Neon, Nitrogen, Xenon	0000000	000000
346	580	0.830"-14	NGO	Right Hand	0.960"-14	NGO	Right Hand	3,000 psi @ 72° F	Air, Argon, Helium, Krypton, Neon, Nitrogen, Xenon	0000000	00000
350	580	0.830"-14	NGO	Left Hand	0.960"-14	NGO	Right Hand	3,000 psi @ 72° F	Argon, Carbon Monoxide, Ethane, Ethylene, Helium, Hydrogen, Krypton, Methane, Methyl Fluoride, Natural Gas, Neon, Nitrogen, Xenon	0000000	00000
540	580	0.908"-14	NGO	Right Hand	0.960"-14	NGO	Right Hand	3,000 psi @ 72° F	Argon, Helium, Krypton, Neon, Nitrogen, Oxygen, Xenon	0000000	00000
555	580	0.908"-14	NGO	Left Hand	0.960"-14	NGO	Right Hand	3,000 psi @ 72° F	Argon, Butane, Helium, Krypton, LP Gas, Neon, Nitrogen, Xenon	0000000	00000

Male Tank × Male Regulator

Maximum Pressure: See table
Maximum Temperature: 120° F

CGA Number		Tank Connection			Regulator Connection
Tank	Regulator	Thread Size	Thread Type	Thread Direction	Thread Size	Thread Type	Thread Direction	Max. Pressure	For Use With		Each
Brass
580	320	0.960"-14	NGO	Right Hand	0.830"-14	NGO	Right Hand	3,000 psi @ 72° F	Argon, Carbon Dioxide, Helium, Krypton, Neon, Nitrogen, Xenon	0000000	000000
580	346	0.960"-14	NGO	Right Hand	0.830"-14	NGO	Right Hand	3,000 psi @ 72° F	Air, Argon, Helium, Krypton, Neon, Nitrogen, Xenon	0000000	00000
580	350	0.960"-14	NGO	Right Hand	0.830"-14	NGO	Left Hand	3,000 psi @ 72° F	Argon, Carbon Monoxide, Ethane, Ethylene, Helium, Hydrogen, Krypton, Methane, Methyl Fluoride, Natural Gas, Neon, Nitrogen, Xenon	0000000	00000
580	540	0.960"-14	NGO	Right Hand	0.908"-14	NGO	Right Hand	3,000 psi @ 72° F	Argon, Helium, Krypton, Neon, Nitrogen, Oxygen, Xenon	0000000	00000
580	555	0.960"-14	NGO	Right Hand	0.908"-14	NGO	Left Hand	3,000 psi @ 72° F	Argon, Butane, Helium, Krypton, LP Gas, Neon, Nitrogen, Xenon	0000000	00000
590	346	0.960"-14	NGO	Left Hand	0.830"-14	NGO	Right Hand	3,000 psi @ 72° F	Air, Sulfur Hexafluoride	0000000	00000

Male Tank × Female Regulator

Maximum Pressure: 3,000 psi @ 72° F
Maximum Temperature: 120° F

CGA Number		Tank Connection			Regulator Connection
Tank	Regulator	Thread Size	Thread Type	Thread Direction	Thread Size	Thread Type	Thread Direction	For Use With		Each
Brass
296	590	0.803"-14	UNS	Right Hand	0.960"-14	NGO	Left Hand	Oxygen Mixtures, Sulfur Hexafluoride	0000000	000000
580	590	0.960"-14	NGO	Right Hand	0.960"-14	NGO	Left Hand	Argon, Helium, Krypton, Neon, Nitrogen, Sulfur Hexafluoride, Xenon	0000000	00000
590	580	0.960"-14	NGO	Left Hand	0.960"-14	NGO	Right Hand	Argon, Helium, Krypton, Neon, Nitrogen, Sulfur Hexafluoride, Xenon	0000000	00000