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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Butt-Weld Fittings for Stainless Steel Tubing
- For Use With: See table
- Temperature Range: See table
- Tubing:
304 Stainless Steel: Use with 304/304L stainless steel that meets ASTM A213, ASTM A269, or ASTM A270, except DIN EN 10357 fittings with only ASTM A269 or ASTM A270
316 Stainless Steel: Use with 316/316L stainless steel that meets ASTM A213, ASTM A269, or ASTM A270, except ASME BPE and DIN EN 10357 fittings with only ASTM A269 or ASTM A270 - Specifications Met: See table
Weld these fittings to tubing for a permanent, flush connection that permits smooth flow through a line.
304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.
For technical drawings and 3-D models, click on a part number.
| For Tube OD | Thread Type | Pipe Size  | Max. Pressure | Max. Vacuum | Temp. Range, °F | Wall Thick. | For Use With | Each | |
304/304L Stainless Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
Polished | |||||||||
| 1" | NPT | 1 | 600 psi @ 72° F | 10 -6 torr @ 72° F | -65° to 250° | 0.065" | Air, Food, Water | 000000000 | 000000 |
| 1 1/2" | NPT | 1 1/2 | 600 psi @ 72° F | 10 -6 torr @ 72° F | -65° to 250° | 0.065" | Air, Food, Water | 000000000 | 00000 |
| 2" | NPT | 2 | 550 psi @ 72° F | 10 -6 torr @ 72° F | -65° to 250° | 0.065" | Air, Food, Water | 000000000 | 00000 |
| 2 1/2" | NPT | 2 1/2 | 450 psi @ 72° F | 10 -6 torr @ 72° F | -65° to 250° | 0.065" | Air, Food, Water | 000000000 | 00000 |
| 3" | NPT | 3 | 350 psi @ 72° F | 10 -6 torr @ 72° F | -65° to 250° | 0.065" | Air, Food, Water | 000000000 | 00000 |
| 4" | NPT | 4 | 250 psi @ 72° F | 10 -6 torr @ 72° F | -65° to 250° | 0.083" | Air, Food, Water | 000000000 | 000000 |
316/316L Stainless Steel | |||||||||
Polished | |||||||||
| 1" | NPT | 1 | 600 psi @ 72° F | 10 -6 torr @ 72° F | -65° to 250° | 0.065" | Air, Food, Water | 00000000 | 00000 |
| 1 1/2" | NPT | 1 1/2 | 600 psi @ 72° F | 10 -6 torr @ 72° F | -65° to 250° | 0.065" | Air, Food, Water | 00000000 | 00000 |
| 2" | NPT | 2 | 550 psi @ 72° F | 10 -6 torr @ 72° F | -65° to 250° | 0.065" | Air, Food, Water | 00000000 | 00000 |
| 3" | NPT | 3 | 350 psi @ 72° F | 10 -6 torr @ 72° F | -65° to 250° | 0.065" | Air, Food, Water | 00000000 | 000000 |
| For Tube OD | Thread Type | Pipe Size | Max. Pressure | Max. Vacuum | Temp. Range, °F | Wall Thick. | For Use With | Each | |
304/304L Stainless Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
Polished | |||||||||
| 1" | NPT | 1 | 600 psi @ 72° F | 10 -6 torr @ 72° F | -65° to 250° | 0.065" | Air, Food, Water | 000000000 | 000000 |
| 1 1/2" | NPT | 1 1/2 | 600 psi @ 72° F | 10 -6 torr @ 72° F | -65° to 250° | 0.065" | Air, Food, Water | 000000000 | 00000 |
| 2" | NPT | 2 | 550 psi @ 72° F | 10 -6 torr @ 72° F | -65° to 250° | 0.065" | Air, Food, Water | 000000000 | 00000 |
| 2 1/2" | NPT | 2 1/2 | 450 psi @ 72° F | 10 -6 torr @ 72° F | -65° to 250° | 0.065" | Air, Food, Water | 000000000 | 000000 |
| 3" | NPT | 3 | 350 psi @ 72° F | 10 -6 torr @ 72° F | -65° to 250° | 0.065" | Air, Food, Water | 000000000 | 000000 |
316/316L Stainless Steel | |||||||||
Polished | |||||||||
| 1" | NPT | 1 | 600 psi @ 72° F | 10 -6 torr @ 72° F | -65° to 250° | 0.065" | Air, Food, Water | 00000000 | 00000 |
| 1 1/2" | NPT | 1 1/2 | 600 psi @ 72° F | 10 -6 torr @ 72° F | -65° to 250° | 0.065" | Air, Food, Water | 00000000 | 00000 |
| 2" | NPT | 2 | 550 psi @ 72° F | 10 -6 torr @ 72° F | -65° to 250° | 0.065" | Air, Food, Water | 00000000 | 000000 |
Hose Crimping Tool and Fitting Sets for Compressed Gas
Sets contain a crimping tool and a variety of fittings, nuts, and ferrules so you can connect pressure regulators, torches, and other components of your welding system. Fittings are also known as CGA (Compressed Gas Association) fittings. They are brass for good corrosion resistance.
Barbed adapters let you adapt to a threaded end so you can connect welding hose to pressure regulators or torches. They consist of a barbed shaft with a rounded end that sits inside a threaded nut so you can make a threaded hose connection.
Barbed connectors are also known as hose menders and splicers. Use them to connect lengths of hose or to repair damaged hose. Slide the barbed end into welding hose and use a hose ferrule and the crimping tool to secure the fitting to hose.
Threaded connectors let you attach threaded welding hose to pressure regulators and torches.
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 Hose ID | No. of Pieces | Includes | Max. Pressure | For Use With | Each | |
Brass | ||||||
|---|---|---|---|---|---|---|
| 3/16", 1/4" | 93 | Crimping Tool Eight barbed hose adapters for 3/16" hose ID (use with A-size nuts) Six barbed hose adapters for 3/16" hose ID (use with B-size nuts) Ten barbed hose adapters for 1/4" hose ID (use with B-size nuts) Two barbed hose connectors for 3/16" hose ID Four barbed hose connectors for 1/4" hose ID One A-size 3/8"-24 male right-hand threaded connector (CGA-020) One A-size 3/8"-24 male left-hand threaded connector (CGA-021) One B-size 9/16"-18 male right-hand threaded connector (CGA-022) One B-size 9/16"-18 male left-hand threaded connector (CGA-023) Four A-size 3/8"-24 right-hand threaded nuts (CGA-020) Four A-size 3/8"-24 left-hand threaded nuts (CGA-021) Eight B-size 9/16"-18 female right-hand threaded nuts (CGA-022) Eight B-size 9/16"-18 female left-hand threaded nuts (CGA-023) Twelve ferrules with 0.45" hose end ID Ten ferrules with 0.562" hose end ID Twelve ferrules with 0.593" hose end ID | 200 psi @ 72° F | Acetylene, Butane, Fuel Gases, LP Gas, Natural Gas, Oxygen, Propane | 0000000 | 0000000 |
| 5/16", 3/8" | 71 | Crimping Tool Eight barbed hose adapters for 5/16" hose ID (use with B-size nuts) Eight barbed hose adapters for 3/8" hose ID (use with B-size nuts) Two barbed hose connectors for 5/16" hose ID Two barbed hose connectors for 3/8" hose ID One B-size 9/16"-18 male right-hand threaded connector (CGA-022) One B-size 9/16"-18 male left-hand threaded connector (CGA-023) Eight B-size 9/16"-18 female right-hand threaded nuts (CGA-022) Eight B-size 9/16"-18 female left-hand threaded nuts (CGA-023) Eight ferrules with 0.625" hose end ID Eight ferrules with 0.656" hose end ID Six ferrules with 0.687" hose end ID Eight ferrules with 0.718" hose end ID | 200 psi @ 72° F | Acetylene, Butane, Fuel Gases, LP Gas, Natural Gas, Oxygen, Propane | 0000000 | 000000 |