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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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.
- 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 | ||||||||||
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 | 00000 |
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 |
- Maximum Pressure: 200 psi @ 72° F
- Maximum Temperature: 120° F
CGA Number | Gas Fitting Size | Thread Size | Thread Type | Thread Direction | Chain Lg. | For Use With | Each | |
Brass | ||||||||
---|---|---|---|---|---|---|---|---|
023 | B | 9/16"-18 | UN/UNF (CGA) | Left Hand | 6" | Acetylene, Butane, Fuel Gases, LP Gas, Natural Gas, Propane | 0000000 | 00000 |
Natural and LP Gas Hose Fittings
3/8 Coupling Size | 1/2 Coupling Size | 3/4 Coupling Size | |
1 Coupling Size | 1 1/4 Coupling Size |
Use these couplings when you need frequent access to a gas line. A complete coupling consists of a plug and a socket (sold separately or in a set) that connect and disconnect quickly. All of the natural and LP gas plugs are compatible with any of the natural and LP gas sockets of the same coupling size, regardless of the pipe size. Plugs and sockets are brass for good corrosion resistance. These couplings are rated ANSI Z21.41/CSA 6.9 for use with gas fuel appliances. CSA-US and CSA Certified, they also meet U.S. and Canadian safety standards.
Plugs are also known as nipples. They have a heat-sensitive fuse that will stop gas flow in the event of a fire.
Sockets have a shut-off valve that stops the flow when the coupling is separated, so gas won’t leak from the line. They are sleeve-lock style. To connect, slide back the sleeve on the socket, insert the plug, and release the sleeve. To disconnect, slide back the sleeve and pull out the plug.
NPTF (Dryseal) threads are compatible with NPT threads.
When couplings are not connected, add dust caps and plugs to keep contaminants out of your gas line.
Warning: Stop the flow before you disconnect the line.
For technical drawings and 3-D models, click on a part number.
- Maximum Pressure: 0.5 psi @ 72° F
- Temperature Range: -40° to 200° F
- Specifications Met: ANSI Z21.41/CSA 6.9, CSA Certified, CSA-US Certified
Plug Tip | ||||||
---|---|---|---|---|---|---|
Coupling Size | Lg. | Dia. | Pipe Size | Thread Type | Each | |
Brass | ||||||
1 1/4 | 19/32" | 1 1/4" | 1 1/4 | NPTF | 00000000 | 000000 |
- Maximum Pressure: 0.5 psi @ 72° F
- Temperature Range: -40° to 200° F
- Specifications Met: ANSI Z21.41/CSA 6.9, CSA Certified, CSA-US Certified
For Plug Tip | ||||||
---|---|---|---|---|---|---|
Coupling Size | Lg. | Dia. | Pipe Size | Thread Type | Each | |
Brass | ||||||
1 1/4 | 19/32" | 1 1/4" | 1 1/4 | NPTF | 00000000 | 0000000 |
- Maximum Pressure: 0.5 psi @ 72° F
- Temperature Range: -40° to 200° F
- Specifications Met: ANSI Z21.41/CSA 6.9, CSA Certified, CSA-US Certified
Dust Caps and Plugs for Natural and LP Gas Hose Fittings
To keep contaminants out of your gas line, add these dust caps and plugs to natural and LP gas couplings when they’re not connected. All work with couplings that are rated ANSI Z21.41/CSA 6.9 for use with gas fuel appliances.
For technical drawings and 3-D models, click on a part number.