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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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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.
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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.
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 | |||||||||||
| 200 | 510 | 0.628"-14 | NGO | Right Hand | 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 | 0000000 | 000000 |
Female 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 | |||||||||||
| 200 | 300 | 0.628"-14 | NGO | Right Hand | 0.830"-14 | NGO | Left Hand | 500 psi @ 72° F | Acetylene, Ethyl Chloride | 0000000 | 000000 |
| 200 | 520 | 0.628"-14 | NGO | Right Hand | 0.899"-14 | NGO | Left Hand | 500 psi @ 72° F | Acetylene | 0000000 | 00000 |
| 520 | 200 | 0.899"-14 | NGO | Right Hand | 0.628"-14 | NGO | Left Hand | 500 psi @ 72° F | Acetylene | 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 | |||||||||||
| 510 | 200 | 0.880"-14 | NGO | Left Hand | 0.628"-14 | NGO | Right Hand | 500 psi @ 72° F | Acetylene, Butane, Cyclopropane, Dimethyl Ether, Ethylene Oxide, Isobutane, Methane, Methyl Chloride, Natural Gas, Propane, Propylene, Vinyl Bromide, Vinyl Chloride | 0000000 | 000000 |