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.
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Argon, Nitrogen, and Oxygen Hose with Male and Female Threaded Fittings
![](/prerenderstable/mvPRE/contents/gfx/imagecache/566/5665k61p1-c01g-digital@halfx_637085814956448699.png?ver=imagenotfound)
- Temperature Range: -65° to 450° F
- Maximum Vacuum: 28" of Hg @ 72° F
- Material: PTFE with 304 Stainless Steel Cover
This hose is often called pigtail hose. It comes cleaned, capped, and bagged to meet CGA (Compressed Gas Association) G4.1. Hose should not be used underground.
For technical drawings and 3-D models, click on a part number.
Argon, Nitrogen, and Oxygen Hose with Female Threaded Fittings
![](/prerenderstable/mvPRE/contents/gfx/imagecache/566/5665k81p1-c01g-digital@halfx_637085889218356033.png?ver=imagenotfound)
- Temperature Range: -65° to 450° F
- Maximum Vacuum: 28" of Hg @ 72° F
- Material: PTFE with 304 Stainless Steel Cover
This hose is often called pigtail hose. It comes cleaned, capped, and bagged to meet CGA (Compressed Gas Association) G4.1. Hose should not be used underground.
For technical drawings and 3-D models, click on a part number.
High-Temperature Argon, Nitrogen, and Oxygen Hose
![](/prerenderstable/mvPRE/contents/gfx/imagecache/566/5665k11p1-c01g-digital@halfx_637206389529308330.png?ver=imagenotfound)
- Temperature Range: -320° to 1,500° F
- Maximum Vacuum: 29" of Hg @ 72° F
- Material: 316 Stainless Steel with 304 Stainless Steel Cover
Transfer industrial gases in temperatures up to 1500° F. The braided reinforcement provides good flexibility in high-vibration applications. A cover surrounds the braid to protect it from damage. Hose comes cleaned, capped, and bagged to meet CGA (Compressed Gas Association) G4.1. It should not be used underground.
For technical drawings and 3-D models, click on a part number.
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.
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.
![](/prerenderstable/mvPRE/contents/gfx/imagecache/791/7919a24-@halfx_637604914801828634.png?ver=imagenotfound)
- Maximum Pressure: 200 psi @ 72° F
- Maximum Temperature: 120° F
CGA Number | Gas Fitting Size | Thread Size | Thread Type | Thread Direction | For Use With | Each | |
Brass | |||||||
---|---|---|---|---|---|---|---|
032 x 022 | B | 5/8"-18 x 9/16"-18 | UN/UNF (CGA) | Right Hand | Argon, Helium, Krypton, Neon, Nitrogen, Oxygen, Xenon | 0000000 | 000000 |
![](/prerenderstable/mvPRE/contents/gfx/imagecache/791/7919a9polished-brasspositive_front_positive_right_flop15_1630614782_658@halfx_637661936816986263.png?ver=imagenotfound)
- Maximum Pressure: 200 psi @ 72° F
- Maximum Temperature: 120° F
Female Hose Connection | Female Pipe Connection | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
CGA Number | Gas Fitting Size | Thread Size | Thread Type | Thread Direction | Pipe Size | Thread Type | Thread Direction | For Use With | Each | |
Brass | ||||||||||
032 | B | 5/8"-18 | UN/UNF (CGA) | Right Hand | 1/4 | NPT | Right Hand | Argon, Helium, Krypton, Neon, Nitrogen, Xenon | 0000000 | 000000 |
![](/prerenderstable/mvPRE/contents/gfx/imagecache/791/7919a23-@halfx_637604917807091973.png?ver=imagenotfound)
- Maximum Pressure: 200 psi @ 72° F
- Maximum Temperature: 120° F
CGA Number | Gas Fitting Size | Thread Size | Thread Type | Thread Direction | For Use With | Each | |
Brass | |||||||
---|---|---|---|---|---|---|---|
032 x 022 | B | 5/8"-18 x 9/16"-18 | UN/UNF (CGA) | Right Hand | Argon, Helium, Krypton, Neon, Nitrogen, Oxygen, Xenon | 0000000 | 000000 |
![](/prerenderstable/mvPRE/contents/gfx/imagecache/792/79215a713-@halfx_637388773365942874.png?ver=imagenotfound)
- 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 | ||||||||||
032 | B | 5/8"-18 | UN/UNF (CGA) | Right Hand | 1/4 | NPT | Right Hand | Argon, Helium, Krypton, Neon, Nitrogen, Xenon | 0000000 | 000000 |
![](/prerenderstable/mvPRE/contents/gfx/imagecache/792/7920a7-@halfx_637604912556767131.png?ver=imagenotfound)
- Maximum Pressure: 200 psi @ 72° F
- Maximum Temperature: 120° F
CGA Number | Gas Fitting Size | Thread Size | Thread Type | Thread Direction | For Use With | Each | |
Brass | |||||||
---|---|---|---|---|---|---|---|
032 | B | 5/8"-18 | UN/UNF (CGA) | Right Hand | Argon, Helium, Krypton, Neon, Nitrogen, Xenon | 000000 | 00000 |
![](/prerenderstable/mvPRE/contents/gfx/imagecache/791/7919a25-@halfx_637604917200556205.png?ver=imagenotfound)
- Maximum Pressure: 200 psi @ 72° F
- Maximum Temperature: 120° F
CGA Number | Gas Fitting Size | Thread Size | Thread Type | Thread Direction | For Use With | Each | |
Brass | |||||||
---|---|---|---|---|---|---|---|
032 | B | 5/8"-18 | UN/UNF (CGA) | Right Hand | Argon, Helium, Krypton, Neon, Nitrogen, Xenon | 0000000 | 000000 |
Nuts for Barbed Hose Fittings for Compressed Gas
Also known as CGA (Compressed Gas Association) nuts, these are designed for low-pressure welding applications downstream of your tank and pressure regulator. Slide a barbed hose adapter for compressed gas into a male or female nut to make a threaded connection to torches or pressure regulators.
Nuts with left-hand threads are identified with a notch.
Brass nuts have good corrosion resistance. Note: Nuts have a CGA number that corresponds to a specific type of gas. Choose a nut with the same CGA number as your tank and other system components.
For technical drawings and 3-D models, click on a part number.
![](/prerenderstable/mvPRE/contents/gfx/imagecache/791/7919a16p1-c01h-digitall@halfx_637084787192490866.png?ver=imagenotfound)
- Maximum Pressure: 200 psi @ 72° F
- Maximum Temperature: 120° F
CGA Number | Gas Fitting Size | Thread Size | Thread Type | Thread Direction | For Use With | Each | |
Brass | |||||||
---|---|---|---|---|---|---|---|
030 | A | 3/8"-24 | UN/UNF (CGA) | Right Hand | Argon, Helium, Krypton, Neon, Nitrogen, Xenon | 000000000 | 00000 |
032 | B | 5/8"-18 | UN/UNF (CGA) | Right Hand | Argon, Helium, Krypton, Neon, Nitrogen, Xenon | 0000000 | 0000 |
033 | B | 5/8"-18 | UN/UNF (CGA) | Left Hand | Air, Water | 0000000 | 0000 |
034 | C | 7/8"-14 | UN/UNF (CGA) | Right Hand | Argon, Helium, Krypton, Neon, Nitrogen, Xenon | 000000000 | 0000 |
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.
For technical drawings and 3-D models, click on a part number.
![](/prerenderstable/mvPRE/contents/gfx/imagecache/791/7919a1-@halfx_637604922365846595.png?ver=imagenotfound)
- 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 | |||||||||||
1/8" | 032, 033 | B | Air, Argon, Helium, Krypton, Neon, Nitrogen, Water, Xenon | 0000000 | 00000 | 032 | 0000000 | 00000 | 033 | 0000000 | 00000 |
3/16" | 032, 033 | B | Air, Argon, Helium, Krypton, Neon, Nitrogen, Water, Xenon | 0000000 | 0000 | 032 | 0000000 | 0000 | 033 | 0000000 | 0000 |
1/4" | 032, 033 | B | Air, Argon, Helium, Krypton, Neon, Nitrogen, Water, Xenon | 0000000 | 0000 | 032 | 0000000 | 0000 | 033 | 0000000 | 0000 |
3/8" | 032, 033 | B | Air, Argon, Helium, Krypton, Neon, Nitrogen, Water, Xenon | 0000000 | 0000 | 032 | 0000000 | 0000 | 033 | 0000000 | 0000 |
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. Aluminum-plated brass nuts have better corrosion and wear resistance than unplated brass. Chrome-plated brass nuts have comparable corrosion and wear resistance to aluminum-plated brass nuts, and have a bright, shiny appearance. 316 stainless steel nuts have excellent corrosion resistance.
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.
![](/prerenderstable/mvPRE/contents/gfx/imagecache/792/79215a653p2-c01h-digitall@halfx_637084786855184561.png?ver=imagenotfound)
- Maximum Pressure: See table
- Maximum Temperature: 120° F, except DIN 477 No. 9: 250° F
Number | Thread Size | Thread Type | Thread Direction | Max. Pressure | For Use With | Each | |
Aluminum-Plated Brass | |||||||
---|---|---|---|---|---|---|---|
CGA 170 | 9/16"-18 | UN/UNF (CGA) | Right Hand | 3,000 psi @ 72° F | Air, Argon, Butane, Carbon Dioxide, Helium, Krypton, Methane, Natural Gas, Neon, Nitrogen, Oxygen, Propane, Propylene | 000000000 | 000000 |
CGA 180 | 5/8"-18 | UN/UNF (CGA) | Right Hand | 3,000 psi @ 72° F | Air, Argon, Butane, Carbon Dioxide, Helium, Krypton, Methane, Natural Gas, Neon, Nitrogen, Oxygen, Propane, Propylene | 000000000 | 00000 |
DIN 477 No. 6 | W 21.8 | Metric | Right Hand | 3,000 psi @ 72° F | Argon, Carbon Dioxide, Cyclobutane, Dichlorotetrafluoroethane, Helium, Krypton, Sulfur Hexafluoride, Trifluoroethane, Xenon | 000000000 | 00000 |
316 Stainless Steel | |||||||
CGA 677 | 1.035"-14 | NGO | Left Hand | 6,400 psi @ 72° F | Argon, Helium, Krypton, Neon, Nitrogen, Xenon | 000000000 | 00000 |
![](/prerenderstable/mvPRE/contents/gfx/imagecache/792/79215a671polished-brassnegative_front_positive_top_flop15_1591279381_598@halfx_637268583651397090.png?ver=imagenotfound)
- Maximum Pressure: See table
- Maximum Temperature: 120° F, except DIN 477 No. 12: 250° F
Number | Thread Size | Pipe Size | Thread Type | Thread Direction | Max. Pressure | For Use With | Each | |
Brass | ||||||||
---|---|---|---|---|---|---|---|---|
CGA 500 | 0.880"-14 | __ | NGO | Right Hand | 3,000 psi @ 72° F | Medical Gas Mixtures | 000000000 | 000000 |
CGA 510 | 0.880"-14 | __ | NGO | Left Hand | 500 psi @ 72° F | Acetylene, Butane, Cyclopropane, Dimethyl Ether, Ethylene Oxide, Isobutane, Methane, Methyl Chloride, Natural Gas, Propane, Propylene, Vinyl Bromide, Vinyl Chloride | 000000000 | 0000 |
CGA 580 | 0.960"-14 | __ | NGO | Right Hand | 3,000 psi @ 72° F | Argon, Helium, Krypton, Neon, Nitrogen, Xenon | 000000000 | 0000 |
CGA 590 | 0.960"-14 | __ | NGO | Left Hand | 3,000 psi @ 72° F | Sulfur Hexafluoride | 000000000 | 0000 |
CGA 680 | 1.040"-14 | __ | NGO | Right Hand | 4,700 psi @ 72° F | Argon, Helium, Krypton, Neon, Nitrogen, Xenon | 000000000 | 00000 |
CGA 702 | 1.120"-14 | __ | NGO | Right Hand | 6,400 psi @ 72° F | Air | 000000000 | 00000 |
Brass with Plastic Grip | ||||||||
CGA 500 | 0.880"-14 | __ | NGO | Right Hand | 3,000 psi @ 72° F | Medical Gas Mixtures | 00000000 | 00000 |
CGA 510 | 0.880"-14 | __ | NGO | Left Hand | 500 psi @ 72° F | Acetylene, Butane, Cyclopropane, Dimethyl Ether, Ethylene Oxide, Isobutane, Methane, Methyl Chloride, Natural Gas, Propane, Propylene, Vinyl Bromide, Vinyl Chloride | 000000000 | 00000 |
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 |
Aluminum-Plated Brass | ||||||||
BS 341 No. 3 | __ | 5/8 | BSPT | Right Hand | 3,000 psi @ 72° F | Air, Argon, Helium, Krypton, Neon, Nitrogen, Oxygen, Perfluoropropane | 000000000 | 00000 |
Chrome-Plated Brass | ||||||||
CGA 510 | 0.880"-14 | __ | NGO | Left Hand | 500 psi @ 72° F | Acetylene, Butane, Cyclopropane, Dimethyl Ether, Ethylene Oxide, Isobutane, Methane, Methyl Chloride, Natural Gas, Propane, Propylene, Vinyl Bromide, Vinyl Chloride | 000000000 | 00000 |
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 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 (sold separately) so you can make a threaded connection.
Brass nipples have good corrosion resistance and are softer than 316 stainless steel nipples, so they're easier to thread together. Chrome-plated brass nipples have better corrosion and wear resistance than unplated brass nipples and have a bright, shiny appearance. 316 stainless steel nipples have excellent corrosion resistance.
Nipples with filter help keep the line clean by preventing small particles and other impurities from entering your pressure regulator.
Nipples that tighten by hand should be paired with a nut with a plastic grip.
For technical drawings and 3-D models, click on a part number.
![](/prerenderstable/mvPRE/contents/gfx/imagecache/792/79215a649-@halfx_637605757262772089.png?ver=imagenotfound)
- Maximum Pressure: See table
- Maximum Temperature: 120° F
Regulator Connection | |||||||
---|---|---|---|---|---|---|---|
For Number (Max. Pressure) | Pipe Size | Thread Type | Lg. | For Use With | Features | Each | |
Brass—Tighten With Wrench | |||||||
CGA 170 (3,000 psi @ 72° F) | 1/8 | NPT | 1 1/4" | Air, Argon, Butane, Carbon Dioxide, Helium, Krypton, Methane, Natural Gas, Neon, Nitrogen, Oxygen, Propane, Propylene | __ | 000000000 | 000000 |
CGA 180 (3,000 psi @ 72° F) | 1/8 | NPT | 2" | Air, Argon, Butane, Carbon Dioxide, Helium, Krypton, Methane, Natural Gas, Neon, Nitrogen, Oxygen, Propane, Propylene | __ | 000000000 | 00000 |
CGA 500, 580, 590 (3,000 psi @ 72° F); CGA 510 (500 psi @ 72° F) | 1/4 | NPT | 2 1/2" | Acetylene, Argon, Butane, Cyclopropane, Dimethyl Ether, Ethylene Oxide, Helium, Isobutane, Krypton, Medical Gas Mixtures, Methane, Methyl Chloride, Natural Gas, Neon, Nitrogen, Propane, Propylene, Sulfur Hexafluoride, Vinyl Chloride, Vinyl Bromide, Xenon | __ | 000000000 | 0000 |
CGA 500, 580, 590 (3,000 psi @ 72° F); CGA 510 (500 psi @ 72° F) | 1/4 | NPT | 3" | Acetylene, Argon, Butane, Cyclopropane, Dimethyl Ether, Ethylene Oxide, Helium, Isobutane, Krypton, Medical Gas Mixtures, Methane, Methyl Chloride, Natural Gas, Neon, Nitrogen, Propane, Propylene, Sulfur Hexafluoride, Vinyl Chloride, Vinyl Bromide, Xenon | __ | 000000000 | 0000 |
CGA 500, 580, 590 (3,000 psi @ 72° F); CGA 510 (500 psi @ 72° F) | 1/4 | NPT | 3 1/2" | Acetylene, Argon, Butane, Cyclopropane, Dimethyl Ether, Ethylene Oxide, Helium, Isobutane, Krypton, Medical Gas Mixtures, Methane, Methyl Chloride, Natural Gas, Neon, Nitrogen, Propane, Propylene, Sulfur Hexafluoride, Vinyl Chloride, Vinyl Bromide, Xenon | __ | 000000000 | 0000 |
CGA 680, 695 (3,000 psi @ 72° F); CGA 702, 703 (4,700 psi @ 72° F) | 1/4 | NPT | 3" | Air, Argon, Flammable Gases, Helium, Hydrogen, Krypton, Methane, Natural Gas, Neon, Nitrogen, Xenon | __ | 000000000 | 00000 |
CGA 680, 695 (3,000 psi @ 72° F); CGA 702, 703 (5,500 psi @ 72° F) | 1/4 | NPT | 3 1/64" | Air, Argon, Flammable Gases, Helium, Hydrogen, Krypton, Methane, Natural Gas, Neon, Nitrogen, Xenon | Filter | 000000000 | 00000 |
BS 341 No. 3 (4,350 psi @ 72° F) | 1/4 | NPT | 2 1/2" | Air, Argon, Helium, Krypton, Neon, Nitrogen, Oxygen, Perfluoropropane | __ | 000000000 | 00000 |
DIN 477 No. 6 (4,350 psi @ 72° F) | 1/4 | NPT | 3 1/2" | Argon, Carbon Dioxide, Cyclobutane, Dichlorotetrafluoroethane, Helium, Krypton, Sulfur Hexafluoride, Trifluoroethane, Xenon | __ | 000000000 | 00000 |
Brass—Tighten By Hand | |||||||
CGA 500, 580, 590 (3,000 psi @ 72° F); CGA 510 (500 psi @ 72° F) | 1/4 | NPT | 2 1/2" | Acetylene, Argon, Butane, Cyclopropane, Dimethyl Ether, Ethylene Oxide, Helium, Isobutane, Krypton, Medical Gas Mixtures, Methane, Methyl Chloride, Natural Gas, Neon, Nitrogen, Propane, Propylene, Sulfur Hexafluoride, Vinyl Chloride, Vinyl Bromide, Xenon | __ | 0000000 | 00000 |
CGA 500, 580, 590 (3,000 psi @ 72° F); CGA 510 (500 psi @ 72° F) | 1/4 | NPT | 3" | Acetylene, Argon, Butane, Cyclopropane, Dimethyl Ether, Ethylene Oxide, Helium, Isobutane, Krypton, Medical Gas Mixtures, Methane, Methyl Chloride, Natural Gas, Neon, Nitrogen, Propane, Propylene, Sulfur Hexafluoride, Vinyl Chloride, Vinyl Bromide, Xenon | __ | 0000000 | 00000 |
CGA 510 (500 psi @ 72° F); CGA 580, 590 (3,000 psi @ 72° F) | 1/4 | NPT | 3 33/64" | Acetylene, Argon, Butane, Cyclopropane, Dimethyl Ether, Ethylene Oxide, Helium, Isobutane, Krypton, Methane, Methyl Chloride, Natural Gas, Neon, Nitrogen, Propane, Propylene, Sulfur Hexafluoride, Vinyl Chloride, Vinyl Bromide, Xenon | __ | 000000000 | 00000 |
CGA 680, 695 (3,000 psi @ 72° F); CGA 702, 703 (4,700 psi @ 72° F) | 1/4 | NPT | 3 1/64" | Air, Argon, Flammable Gases, Helium, Hydrogen, Krypton, Methane, Natural Gas, Neon, Nitrogen, Xenon | __ | 0000000 | 00000 |
Chrome-Plated Brass—Tighten With Wrench | |||||||
CGA 500, 580, 590 (3,000 psi @ 72° F); CGA 510 (500 psi @ 72° F) | 1/4 | NPT | 2 1/2" | Acetylene, Argon, Butane, Cyclopropane, Dimethyl Ether, Ethylene Oxide, Helium, Isobutane, Krypton, Medical Gas Mixtures, Methane, Methyl Chloride, Natural Gas, Neon, Nitrogen, Propane, Propylene, Sulfur Hexafluoride, Vinyl Chloride, Vinyl Bromide, Xenon | __ | 0000000 | 00000 |
CGA 500, 580, 590 (3,000 psi @ 72° F); CGA 510 (500 psi @ 72° F) | 1/4 | NPT | 3" | Acetylene, Argon, Butane, Cyclopropane, Dimethyl Ether, Ethylene Oxide, Helium, Isobutane, Krypton, Medical Gas Mixtures, Methane, Methyl Chloride, Natural Gas, Neon, Nitrogen, Propane, Propylene, Sulfur Hexafluoride, Vinyl Chloride, Vinyl Bromide, Xenon | __ | 0000000 | 00000 |
CGA 510 (500 psi @ 72° F); CGA 580, 590 (3,000 psi @ 72° F) | 1/4 | NPT | 3 1/2" | Acetylene, Argon, Butane, Cyclopropane, Dimethyl Ether, Ethylene Oxide, Helium, Isobutane, Krypton, Methane, Methyl Chloride, Natural Gas, Neon, Nitrogen, Propane, Propylene, Sulfur Hexafluoride, Vinyl Chloride, Vinyl Bromide, Xenon | __ | 000000000 | 00000 |
CGA 680, 695 (3,000 psi @ 72° F); CGA 702, 703 (4,700 psi @ 72° F) | 1/4 | __ | 3 1/64" | Air, Argon, Flammable Gases, Helium, Hydrogen, Krypton, Methane, Natural Gas, Neon, Nitrogen, Xenon | __ | 0000000 | 00000 |
316 Stainless Steel—Tighten With Wrench | |||||||
CGA 677 (6,400 psi @ 72° F) | 1/4 | NPT | 2 1/2" | Argon, Helium, Krypton, Neon, Nitrogen, Xenon | __ | 000000000 | 00000 |
![](/prerenderstable/mvPRE/contents/gfx/imagecache/792/79215a653p2-c01h-digitall@halfx_637084786855184561.png?ver=imagenotfound)
![](/prerenderstable/mvPRE/contents/gfx/imagecache/792/79215a671polished-brassnegative_front_positive_top_flop15_1591279381_598@halfx_637268583651397090.png?ver=imagenotfound)
- Maximum Pressure: See table
- Maximum Temperature: 120° F
Number | Gender | Thread Size | Pipe Size | Thread Type | Thread Direction | Max. Pressure | For Use With | Each | |
Brass | |||||||||
---|---|---|---|---|---|---|---|---|---|
CGA 500 | Male | 0.880"-14 | __ | NGO | Right Hand | 3,000 psi @ 72° F | Medical Gas Mixtures | 000000000 | 000000 |
CGA 510 | Male | 0.880"-14 | __ | NGO | Left Hand | 500 psi @ 72° F | Acetylene, Butane, Cyclopropane, Dimethyl Ether, Ethylene Oxide, Isobutane, Methane, Methyl Chloride, Natural Gas, Propane, Propylene, Vinyl Bromide, Vinyl Chloride | 000000000 | 0000 |
CGA 580 | Male | 0.960"-14 | __ | NGO | Right Hand | 3,000 psi @ 72° F | Argon, Helium, Krypton, Neon, Nitrogen, Xenon | 000000000 | 0000 |
CGA 590 | Male | 0.960"-14 | __ | NGO | Left Hand | 3,000 psi @ 72° F | Sulfur Hexafluoride | 000000000 | 0000 |
CGA 680 | Male | 1.040"-14 | __ | NGO | Right Hand | 4,700 psi @ 72° F | Argon, Helium, Krypton, Neon, Nitrogen, Xenon | 000000000 | 00000 |
CGA 702 | Male | 1.120"-14 | __ | NGO | Right Hand | 6,400 psi @ 72° F | Air | 000000000 | 00000 |
Brass with Plastic Grip | |||||||||
CGA 500 | Male | 0.880"-14 | __ | NGO | Right Hand | 3,000 psi @ 72° F | Medical Gas Mixtures | 00000000 | 00000 |
CGA 510 | Male | 0.880"-14 | __ | NGO | Left Hand | 500 psi @ 72° F | Acetylene, Butane, Cyclopropane, Dimethyl Ether, Ethylene Oxide, Isobutane, Methane, Methyl Chloride, Natural Gas, Propane, Propylene, Vinyl Bromide, Vinyl Chloride | 000000000 | 00000 |
CGA 580 | Male | 0.960"-14 | __ | NGO | Right Hand | 3,000 psi @ 72° F | Argon, Helium, Krypton, Neon, Nitrogen, Xenon | 000000000 | 00000 |
CGA 590 | Male | 0.960"-14 | __ | UN/UNF (CGA) | Left Hand | 3,000 psi @ 72° F | Sulfur Hexafluoride | 00000000 | 00000 |
Aluminum-Plated Brass | |||||||||
CGA 170 | Female | 9/16"-18 | __ | UN/UNF (CGA) | Right Hand | 3,000 psi @ 72° F | Air, Argon, Butane, Carbon Dioxide, Helium, Krypton, Methane, Natural Gas, Neon, Nitrogen, Oxygen, Propane, Propylene | 000000000 | 00000 |
CGA 180 | Female | 5/8"-18 | __ | UN/UNF (CGA) | Right Hand | 3,000 psi @ 72° F | Air, Argon, Butane, Carbon Dioxide, Helium, Krypton, Methane, Natural Gas, Neon, Nitrogen, Oxygen, Propane, Propylene | 000000000 | 00000 |
BS 341 No. 3 | Male | __ | 5/8 | BSPT | Right Hand | 3,000 psi @ 72° F | Air, Argon, Helium, Krypton, Neon, Nitrogen, Oxygen, Perfluoropropane | 000000000 | 00000 |
DIN 477 No. 6 | Female | W 21.8 | __ | Metric | Right Hand | 3,000 psi @ 72° F | Argon, Carbon Dioxide, Cyclobutane, Dichlorotetrafluoroethane, Helium, Krypton, Sulfur Hexafluoride, Trifluoroethane, Xenon | 000000000 | 00000 |
Chrome-Plated Brass | |||||||||
CGA 510 | Male | 0.880"-14 | __ | NGO | Left Hand | 500 psi @ 72° F | Acetylene, Butane, Cyclopropane, Dimethyl Ether, Ethylene Oxide, Isobutane, Methane, Methyl Chloride, Natural Gas, Propane, Propylene, Vinyl Bromide, Vinyl Chloride | 000000000 | 00000 |
CGA 580 | Male | 0.960"-14 | __ | NGO | Right Hand | 3,000 psi @ 72° F | Argon, Helium, Krypton, Neon, Nitrogen, Xenon | 000000000 | 00000 |
CGA 590 | Male | 0.960"-14 | __ | NGO | Left Hand | 3,000 psi @ 72° F | Sulfur Hexafluoride | 000000000 | 00000 |
316 Stainless Steel | |||||||||
CGA 677 | Female | 1.035"-14 | __ | NGO | Left Hand | 6,400 psi @ 72° F | Argon, Helium, Krypton, Neon, Nitrogen, Xenon | 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.
![](/prerenderstable/mvPRE/contents/gfx/imagecache/792/7923a13p1-c01h-digitall@halfx_637084786223927556.png?ver=imagenotfound)
- 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 |
![](/prerenderstable/mvPRE/contents/gfx/imagecache/792/7923a33p1-c01h-digitall@halfx_637084788233139947.png?ver=imagenotfound)
- 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 |
![](/prerenderstable/mvPRE/contents/gfx/imagecache/792/7923a35p1-c01h-digital@halfx_637084794930258943.png?ver=imagenotfound)
- 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 | ||||||||||
580 | 590 | 0.960"-14 | NGO | Right Hand | 0.960"-14 | NGO | Left Hand | Argon, Helium, Krypton, Neon, Nitrogen, Sulfur Hexafluoride, Xenon | 0000000 | 000000 |
590 | 580 | 0.960"-14 | NGO | Left Hand | 0.960"-14 | NGO | Right Hand | Argon, Helium, Krypton, Neon, Nitrogen, Sulfur Hexafluoride, Xenon | 0000000 | 00000 |