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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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37° Flared Fittings for Stainless Steel Tubing
- Tubing: Use with welded or seamless 304 or 316 stainless steel that meets ASTM A213, ASTM A249, or ASTM A269
- Specifications Met: ISO 8434, SAE J514, except fittings with BSPP and BSPT threads meet SAE J514 only
Also known as JIC (Joint Industrial Council) fittings, these provide a tight metal-to-metal seal on tubing that is flared to 37°. They withstand high pressure, so they’re often used in hydraulic applications. Made from 316 stainless steel, they resist corrosion from water and chemicals. A complete fitting requires a nut and a sleeve (ferrule) for each tube end. Nuts and sleeves are sold separately.
Caps
- For Use With: Air, Hydraulic Fluid, Isopropyl Alcohol, Natural Gas, Phosphoric Acid, Water
- Temperature Range: See table
| For Tube OD | Material | Temp. Range, °F | Each | |
| 1/8" | 316 Stainless Steel | -420° to 1200° | 000000000 | 000000 |
| 3/16" | 316 Stainless Steel | -380° to 800° | 000000000 | 00000 |
| 1/4" | 316 Stainless Steel | -420° to 1200° | 000000000 | 00000 |
| 5/16" | 316 Stainless Steel | -420° to 1200° | 000000000 | 00000 |
| 3/8" | 316 Stainless Steel | -420° to 1200° | 000000000 | 00000 |
| 1/2" | 316 Stainless Steel | -420° to 1200° | 000000000 | 00000 |
| 5/8" | 316 Stainless Steel | -420° to 1200° | 000000000 | 00000 |
| 3/4" | 316 Stainless Steel | -420° to 1200° | 000000000 | 00000 |
| 7/8" | 316 Stainless Steel | -380° to 800° | 000000000 | 00000 |
| 1" | 316 Stainless Steel | -420° to 1200° | 000000000 | 00000 |
| 1 1/4" | 316 Stainless Steel | -420° to 1200° | 000000000 | 000000 |
| 1 1/2" | 316 Stainless Steel | -420° to 1200° | 000000000 | 000000 |
| 2" | 316 Stainless Steel | -420° to 1200° | 000000000 | 000000 |
Plugs
- For Use With: Air, Hydraulic Fluid, Isopropyl Alcohol, Natural Gas, Phosphoric Acid, Water
- Temperature Range: See table
| For Tube OD | Material | Temp. Range, °F | Each | |
| 1/8" | 316 Stainless Steel | -420° to 1200° | 000000000 | 000000 |
| 3/16" | 316 Stainless Steel | -380° to 800° | 000000000 | 00000 |
| 1/4" | 316 Stainless Steel | -420° to 1200° | 000000000 | 00000 |
| 5/16" | 316 Stainless Steel | -420° to 1200° | 000000000 | 00000 |
| 3/8" | 316 Stainless Steel | -420° to 1200° | 000000000 | 00000 |
| 1/2" | 316 Stainless Steel | -420° to 1200° | 000000000 | 00000 |
| 5/8" | 316 Stainless Steel | -420° to 1200° | 000000000 | 00000 |
| 3/4" | 316 Stainless Steel | -420° to 1200° | 000000000 | 00000 |
| 7/8" | 316 Stainless Steel | -380° to 800° | 000000000 | 00000 |
| 1" | 316 Stainless Steel | -420° to 1200° | 000000000 | 00000 |
| 1 1/4" | 316 Stainless Steel | -420° to 1200° | 000000000 | 000000 |
| 1 1/2" | 316 Stainless Steel | -420° to 1200° | 000000000 | 000000 |
| 2" | 316 Stainless Steel | -420° to 1200° | 000000000 | 000000 |
Nuts
- For Use With: Air, Hydraulic Fluid, Isopropyl Alcohol, Natural Gas, Phosphoric Acid, Water
- Temperature Range: -420° to 1,200° F
| For Tube OD | Nut Material | Each | |
| 1/8" | 316 Stainless Steel | 000000000 | 00000 |
| 3/16" | 316 Stainless Steel | 000000000 | 0000 |
| 1/4" | 316 Stainless Steel | 000000000 | 0000 |
| 5/16" | 316 Stainless Steel | 000000000 | 0000 |
| 3/8" | 316 Stainless Steel | 000000000 | 0000 |
| 1/2" | 316 Stainless Steel | 000000000 | 0000 |
| 5/8" | 316 Stainless Steel | 000000000 | 00000 |
| 3/4" | 316 Stainless Steel | 000000000 | 00000 |
| 7/8" | 316 Stainless Steel | 000000000 | 00000 |
| 1" | 316 Stainless Steel | 000000000 | 00000 |
| 1 1/4" | 316 Stainless Steel | 000000000 | 00000 |
| 1 1/2" | 316 Stainless Steel | 000000000 | 000000 |
| 2" | 316 Stainless Steel | 000000000 | 000000 |
Sleeves
- For Use With: Air, Hydraulic Fluid, Isopropyl Alcohol, Natural Gas, Phosphoric Acid, Water
- Temperature Range: -420° to 1,200° F
Use these sleeves with a nut and fitting to provide a tight metal-to-metal seal on stainless steel tubing that is flared to 37°. Sleeves are 316 stainless steel for excellent corrosion resistance. They are also known as ferrules.
Inch × metric sleeve adapters convert the fitting from inch to metric.
For Tube OD | ||||
|---|---|---|---|---|
| Inch | Metric, mm | Sleeve Material | Each | |
Inch | ||||
| 1/8" | __ | 316 Stainless Steel | 000000000 | 00000 |
| 3/16" | __ | 316 Stainless Steel | 000000000 | 0000 |
| 1/4" | __ | 316 Stainless Steel | 000000000 | 0000 |
| 5/16" | __ | 316 Stainless Steel | 000000000 | 0000 |
| 3/8" | __ | 316 Stainless Steel | 000000000 | 0000 |
| 1/2" | __ | 316 Stainless Steel | 000000000 | 0000 |
| 5/8" | __ | 316 Stainless Steel | 000000000 | 00000 |
| 3/4" | __ | 316 Stainless Steel | 000000000 | 00000 |
| 7/8" | __ | 316 Stainless Steel | 000000000 | 00000 |
| 1" | __ | 316 Stainless Steel | 000000000 | 00000 |
| 1 1/4" | __ | 316 Stainless Steel | 000000000 | 00000 |
| 1 1/2" | __ | 316 Stainless Steel | 000000000 | 00000 |
| 2" | __ | 316 Stainless Steel | 000000000 | 000000 |
Inch × Metric | ||||
| 1/4" | 6 | 316 Stainless Steel | 000000000 | 00000 |
| 5/16" | 8 | 316 Stainless Steel | 000000000 | 00000 |
| 3/8" | 10 | 316 Stainless Steel | 000000000 | 00000 |
| 1/2" | 12 | 316 Stainless Steel | 000000000 | 00000 |
Precision AN 37° Flared Fittings for Stainless Steel Tubing
- For Use With: Air, Cutting Oil, Fuel Oil, Hydraulic Fluid, Mineral Oil, Water
- Temperature Range: -320° to 1200° F
- Tubing: Use with seamless 304 or 316 stainless steel
- Specifications Met: See table
The threads on the tube end of these fittings are Class 3A or 3B and adhere to tighter tolerances than other 37° flared fittings. They are made to exact AS (formerly AN) specifications and provide a tight metal-to-metal seal on tubing that is flared to 37°. Fittings require a nut and a sleeve (ferrule) for each tube end. Nuts and sleeves are sold separately.
304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.
Caps
| For Tube OD | Max. Pressure | Specifications Met | Each | |
304 Stainless Steel | ||||
|---|---|---|---|---|
| 1/8" | 3,000 psi @ 72° F | AN929-2J, ASTM A380, SAE AS4841 | 0000000 | 000000 |
| 1/4" | 3,000 psi @ 72° F | AN929-4J, ASTM A380, SAE AS4841 | 0000000 | 00000 |
| 3/8" | 3,000 psi @ 72° F | AN929-6J, ASTM A380, SAE AS4841 | 0000000 | 00000 |
| 1/2" | 3,000 psi @ 72° F | AN929-8J, ASTM A380, SAE AS4841 | 0000000 | 00000 |
| 3/4" | 3,000 psi @ 72° F | AN929-12J, ASTM A380, SAE AS4841 | 0000000 | 00000 |
| 1" | 3,000 psi @ 72° F | AN929-16J, ASTM A380, SAE AS4841 | 00000000 | 00000 |
316 Stainless Steel | ||||
| 1/8" | 3,000 psi @ 72° F | AN929-2K, ASTM A380, SAE AS4841 | 00000000 | 00000 |
| 1/4" | 3,000 psi @ 72° F | AN929-4K, ASTM A380, SAE AS4841 | 00000000 | 00000 |
| 3/8" | 3,000 psi @ 72° F | AN929-6K, ASTM A380, SAE AS4841 | 00000000 | 00000 |
| 1/2" | 3,000 psi @ 72° F | AN929-8K, ASTM A380, SAE AS4841 | 00000000 | 00000 |
| 3/4" | 3,000 psi @ 72° F | AN929-12K, ASTM A380, SAE AS4841 | 00000000 | 00000 |
| 1" | 3,000 psi @ 72° F | AN929-16K, ASTM A380, SAE AS4841 | 00000000 | 00000 |
| 1 1/4" | 1,500 psi @ 72° F | AN929-20K, ASTM A380, SAE AS4841 | 00000000 | 000000 |
| 1 1/2" | 1,500 psi @ 72° F | AN929-24K, ASTM A380, SAE AS4841 | 00000000 | 000000 |
| 2" | 1,500 psi @ 72° F | AN929-32K, ASTM A380, SAE AS4841 | 00000000 | 000000 |
Plugs
| For Tube OD | Max. Pressure | Specifications Met | Each | |
304 Stainless Steel | ||||
|---|---|---|---|---|
| 1/8" | 3,000 psi @ 72° F | AN806-J2, ASTM A380, SAE AS4841 | 0000000 | 000000 |
| 1/4" | 3,000 psi @ 72° F | AN806-J4, ASTM A380, SAE AS4841 | 0000000 | 00000 |
| 5/16" | 3,000 psi @ 72° F | AN806-J5, ASTM A380, SAE AS4841 | 00000000 | 00000 |
| 3/8" | 3,000 psi @ 72° F | AN806-J6, ASTM A380, SAE AS4841 | 0000000 | 00000 |
| 1/2" | 3,000 psi @ 72° F | AN806-J8, ASTM A380, SAE AS4841 | 0000000 | 00000 |
| 3/4" | 3,000 psi @ 72° F | AN806-J12, ASTM A380, SAE AS4841 | 0000000 | 00000 |
| 1" | 3,000 psi @ 72° F | AN806-J16, ASTM A380, SAE AS4841 | 00000000 | 00000 |
| 1 1/4" | 1,500 psi @ 72° F | AN806-J20, ASTM A380, SAE AS4841 | 00000000 | 00000 |
316 Stainless Steel | ||||
| 1/8" | 3,000 psi @ 72° F | AN806-K2, ASTM A380, SAE AS4841 | 00000000 | 00000 |
| 1/4" | 3,000 psi @ 72° F | AN806-K4, ASTM A380, SAE AS4841 | 00000000 | 00000 |
| 3/8" | 3,000 psi @ 72° F | AN806-K6, ASTM A380, SAE AS4841 | 00000000 | 00000 |
| 1/2" | 3,000 psi @ 72° F | AN806-K8, ASTM A380, SAE AS4841 | 00000000 | 00000 |
| 5/8" | 3,000 psi @ 72° F | AN806-K10, ASTM A380, SAE AS4841 | 00000000 | 00000 |
| 3/4" | 3,000 psi @ 72° F | AN806-K12, ASTM A380, SAE AS4841 | 00000000 | 00000 |
| 1" | 3,000 psi @ 72° F | AN806-K16, ASTM A380, SAE AS4841 | 00000000 | 00000 |
| 1 1/4" | 1,500 psi @ 72° F | AN806-K20, ASTM A380, SAE AS4841 | 00000000 | 000000 |
| 1 1/2" | 1,500 psi @ 72° F | AN806-K24, ASTM A380, SAE AS4841 | 00000000 | 000000 |
Nuts
| For Tube OD | Max. Pressure | Specifications Met | Each | |
304 Stainless Steel | ||||
|---|---|---|---|---|
| 1/8" | 3,000 psi @ 72° F | AN818-2J, ASTM A380, SAE AS4841 | 0000000 | 00000 |
| 1/4" | 3,000 psi @ 72° F | AN818-4J, ASTM A380, SAE AS4841 | 0000000 | 0000 |
| 5/16" | 3,000 psi @ 72° F | AN818-5J, ASTM A380, SAE AS4841 | 00000000 | 00000 |
| 3/8" | 3,000 psi @ 72° F | AN818-6J, ASTM A380, SAE AS4841 | 0000000 | 0000 |
| 1/2" | 3,000 psi @ 72° F | AN818-8J, ASTM A380, SAE AS4841 | 0000000 | 00000 |
| 3/4" | 3,000 psi @ 72° F | AN818-12J, ASTM A380, SAE AS4841 | 0000000 | 00000 |
| 1" | 3,000 psi @ 72° F | AN818-16J, ASTM A380, SAE AS4841 | 00000000 | 00000 |
| 1 1/4" | 1,500 psi @ 72° F | AN818-20J, ASTM A380, SAE AS4841 | 00000000 | 00000 |
316 Stainless Steel | ||||
| 1/8" | 3,000 psi @ 72° F | AN818-2K, ASTM A380, SAE AS4841 | 00000000 | 00000 |
| 1/4" | 3,000 psi @ 72° F | AN818-4K, ASTM A380, SAE AS4841 | 00000000 | 00000 |
| 3/8" | 3,000 psi @ 72° F | AN818-6K, ASTM A380, SAE AS4841 | 00000000 | 00000 |
| 1/2" | 3,000 psi @ 72° F | AN818-8K, ASTM A380, SAE AS4841 | 00000000 | 00000 |
| 5/8" | 3,000 psi @ 72° F | AN818-10K, ASTM A380, SAE AS4841 | 00000000 | 00000 |
| 3/4" | 3,000 psi @ 72° F | AN818-12K, ASTM A380, SAE AS4841 | 00000000 | 00000 |
| 1" | 3,000 psi @ 72° F | AN818-16K, ASTM A380, SAE AS4841 | 00000000 | 00000 |
| 1 1/4" | 1,500 psi @ 72° F | AN818-20K, ASTM A380, SAE AS4841 | 00000000 | 000000 |
| 1 1/2" | 1,500 psi @ 72° F | AN818-24K, ASTM A380, SAE AS4841 | 00000000 | 00000 |
| 2" | 1,500 psi @ 72° F | AN818-32K, ASTM A380, SAE AS4841 | 00000000 | 000000 |
Sleeves
| For Tube OD | Max. Pressure | Specifications Met | Each | |
304 Stainless Steel | ||||
|---|---|---|---|---|
| 1/8" | 3,000 psi @ 72° F | AN819-2J, ASTM A380, MS20819, SAE AS4841, SAE AS5176 | 0000000 | 00000 |
| 1/4" | 3,000 psi @ 72° F | AN819-4J, ASTM A380, MS20819, SAE AS4841, SAE AS5176 | 0000000 | 0000 |
| 5/16" | 3,000 psi @ 72° F | AN819-5J, ASTM A380, MS20819, SAE AS4841, SAE AS5176 | 00000000 | 0000 |
| 3/8" | 3,000 psi @ 72° F | AN819-6J, ASTM A380, MS20819, SAE AS4841, SAE AS5176 | 0000000 | 0000 |
| 1/2" | 3,000 psi @ 72° F | AN819-8J, ASTM A380, MS20819, SAE AS4841, SAE AS5176 | 0000000 | 0000 |
| 3/4" | 3,000 psi @ 72° F | AN819-12J, ASTM A380, MS20819, SAE AS4841, SAE AS5176 | 0000000 | 00000 |
| 1" | 3,000 psi @ 72° F | AN819-16J, ASTM A380, MS20819, SAE AS4841, SAE AS5176 | 00000000 | 00000 |
| 1 1/4" | 1,500 psi @ 72° F | AN819-20J, ASTM A380, MS20819, SAE AS4841, SAE AS5176 | 00000000 | 00000 |
316 Stainless Steel | ||||
| 1/8" | 3,000 psi @ 72° F | AN819-2K, ASTM A380, MS20819, SAE AS4841, SAE AS5176 | 00000000 | 0000 |
| 1/4" | 3,000 psi @ 72° F | AN819-4K, ASTM A380, MS20819, SAE AS4841, SAE AS5176 | 00000000 | 0000 |
| 3/8" | 3,000 psi @ 72° F | AN819-6K, ASTM A380, MS20819, SAE AS4841, SAE AS5176 | 00000000 | 00000 |
| 1/2" | 3,000 psi @ 72° F | AN819-8K, ASTM A380, MS20819, SAE AS4841, SAE AS5176 | 00000000 | 00000 |
| 5/8" | 3,000 psi @ 72° F | AN819-10K, ASTM A380, MS20819, SAE AS4841, SAE AS5176 | 00000000 | 00000 |
| 3/4" | 3,000 psi @ 72° F | AN819-12K, ASTM A380, MS20819, SAE AS4841, SAE AS5176 | 00000000 | 00000 |
| 1" | 3,000 psi @ 72° F | AN819-16K, ASTM A380, MS20819, SAE AS4841, SAE AS5176 | 00000000 | 00000 |
| 1 1/4" | 1,500 psi @ 72° F | AN819-20K, ASTM A380, MS20819, SAE AS4841, SAE AS5176 | 00000000 | 00000 |
| 1 1/2" | 1,500 psi @ 72° F | AN819-24K, ASTM A380, MS20819, SAE AS4841, SAE AS5176 | 00000000 | 00000 |
| 2" | 1,500 psi @ 72° F | AN819-32K, ASTM A380, MS20819, SAE AS4841, SAE AS5176 | 00000000 | 00000 |
Vibration-Resistant Precision AN 37° Flared Fittings for Stainless Steel Tubing
- For Use With: Air, Cutting Oil, Fuel Oil, Hydraulic Fluid, Mineral Oil, Water
- Temperature Range: -320° to 500° F
- Tubing: Use with seamless 304 or 316 stainless steel
- Specifications Met: See Table
A PTFE seal on the tube end of these fittings allows for an extra-strong connection in high-vibration applications. The threads on the tube end are Class 3A and adhere to tighter tolerances than other 37° flared fittings. They are made to exact AS (formerly AN) specifications and provide a tight metal-to-metal seal on tubing that is flared to 37°. Fittings are 316 stainless steel for excellent corrosion resistance. They require a nut and a sleeve (ferrule) for each tube end. Nuts and sleeves are sold separately.
Plugs
PTFE Seal
| For Tube OD | Material | Max. Pressure | Specifications Met | Each | |
| 1/4" | 316 Stainless Steel | 3,000 psi @ 72° F | ASTM A380, SAE AS9100D, SAE AS9104/1 | 00000000 | 000000 |
| 3/8" | 316 Stainless Steel | 3,000 psi @ 72° F | ASTM A380, SAE AS9100D, SAE AS9104/1 | 00000000 | 00000 |
| 1/2" | 316 Stainless Steel | 3,000 psi @ 72° F | ASTM A380, SAE AS9100D, SAE AS9104/1 | 00000000 | 00000 |
| 3/4" | 316 Stainless Steel | 3,000 psi @ 72° F | ASTM A380, SAE AS9100D, SAE AS9104/1 | 00000000 | 00000 |
Nuts
| For Tube OD | Nut Material | Max. Pressure | Specifications Met | Each | |
| 1/4" | 316 Stainless Steel | 3,000 psi @ 72° F | AN818-4K, ASTM A380, SAE AS4841 | 00000000 | 000000 |
| 3/8" | 316 Stainless Steel | 3,000 psi @ 72° F | AN818-6K, ASTM A380, SAE AS4841 | 00000000 | 00000 |
| 1/2" | 316 Stainless Steel | 3,000 psi @ 72° F | AN818-8K, ASTM A380, SAE AS4841 | 00000000 | 00000 |
| 3/4" | 316 Stainless Steel | 3,000 psi @ 72° F | AN818-12K, ASTM A380, SAE AS4841 | 00000000 | 00000 |
Sleeves
| For Tube OD | Sleeve Material | Max. Pressure | Specifications Met | Each | |
| 1/4" | 316 Stainless Steel | 3,000 psi @ 72° F | AN819-4K, ASTM A380, MS20819, SAE AS4841 | 00000000 | 00000 |
| 3/8" | 316 Stainless Steel | 3,000 psi @ 72° F | AN819-6K, ASTM A380, MS20819, SAE AS4841 | 00000000 | 00000 |
| 1/2" | 316 Stainless Steel | 3,000 psi @ 72° F | AN819-8K, ASTM A380, MS20819, SAE AS4841 | 00000000 | 00000 |
| 3/4" | 316 Stainless Steel | 3,000 psi @ 72° F | AN819-12K, ASTM A380, MS20819, SAE AS4841 | 00000000 | 00000 |
Build-Your-Own High-Pressure Braided Chemical Hose
- Temperature Range: -40° to 350° F
- Hose: PTFE with 304 Stainless Steel Braid
- Female Fittings Swivel Until Tightened
Use shears or a cutoff saw and wrap the hose ends with tape to cut the hose to your desired length and then attach the fittings. You don’t need any special equipment to install. After you attach the fittings, be sure to test the hose for required pressure prior to using.
To attach fittings to hose, push the socket over the stainless steel braid, then wedge the sleeve under the braid. Next, insert the nipple into the hose and hand-tighten the socket onto the nipple. Finish by wrench-tightening the hex nipple until it is flush against the socket.
Female fittings are also known as JIC (Joint Industrial Council) fittings. They swivel until tightened for easy installation. Brass fittings with zinc-plated steel nut have fair corrosion resistance; 303 stainless steel fittings have very good corrosion resistance.
Female Fittings
| For Hose ID | Thread Size | Max. Pressure | Each | |
303 Stainless Steel 37° Flared UNF Female | ||||
|---|---|---|---|---|
| 3/16" | 7/16"-20 | 1,500 psi @ 72° F | 00000000 | 000000 |
| 1/4" | 1/2"-20 | 1,500 psi @ 72° F | 00000000 | 00000 |
| 5/16" | 9/16"-18 | 1,500 psi @ 72° F | 00000000 | 00000 |
| 3/8" | 3/4"-16 | 1,500 psi @ 72° F | 00000000 | 00000 |
| 1/2" | 7/8"-14 | 1,500 psi @ 72° F | 00000000 | 00000 |
| 5/8" | 1 1/16"-12 | 1,200 psi @ 72° F | 00000000 | 000000 |
| 7/8" | 1 5/16"-12 | 1,000 psi @ 72° F | 00000000 | 000000 |