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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 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.
Nipples with filter help keep the line clean by preventing small particles and other impurities from entering your pressure regulator.
Nipples, Tank × Male Regulator
- 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 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 | 000000 |
| 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 |
Nuts
Male Nut
- Maximum Pressure: See table
- Maximum Temperature: 120° F