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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 are 316 stainless steel for excellent corrosion resistance. Fittings require a nut and a sleeve (ferrule) for each tube end. Nuts and sleeves are sold separately.
For technical drawings and 3-D models, click on a part number.
Caps
- For Use With: Air, Hydraulic Fluid, Isopropyl Alcohol, Natural Gas, Phosphoric Acid, Water
- Temperature Range: -420° to 1,200° F
| For Tube OD | Material | Each | |
| 1/8" | 316 Stainless Steel | 000000000 | 000000 |
| 1/4" | 316 Stainless Steel | 000000000 | 0000 |
| 5/16" | 316 Stainless Steel | 000000000 | 00000 |
| 3/8" | 316 Stainless Steel | 000000000 | 0000 |
| 1/2" | 316 Stainless Steel | 000000000 | 00000 |
| 5/8" | 316 Stainless Steel | 000000000 | 00000 |
| 3/4" | 316 Stainless Steel | 000000000 | 00000 |
| 1" | 316 Stainless Steel | 000000000 | 00000 |
Plugs
- For Use With: Air, Hydraulic Fluid, Isopropyl Alcohol, Natural Gas, Phosphoric Acid, Water
- Temperature Range: -420° to 1,200° F
| For Tube OD | Material | Each | |
| 1/8" | 316 Stainless Steel | 000000000 | 000000 |
| 1/4" | 316 Stainless Steel | 000000000 | 0000 |
| 5/16" | 316 Stainless Steel | 000000000 | 00000 |
| 3/8" | 316 Stainless Steel | 000000000 | 0000 |
| 1/2" | 316 Stainless Steel | 000000000 | 00000 |
| 5/8" | 316 Stainless Steel | 000000000 | 00000 |
| 3/4" | 316 Stainless Steel | 000000000 | 00000 |
| 1" | 316 Stainless Steel | 000000000 | 00000 |
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 |
| 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 |
| 1" | 316 Stainless Steel | 000000000 | 00000 |
Sleeves
- For Use With: Air, Hydraulic Fluid, Isopropyl Alcohol, Natural Gas, Phosphoric Acid, Water
- Temperature Range: -420° to 1,200° F
For Tube OD | ||||
|---|---|---|---|---|
| Inch | Metric, mm | Sleeve Material | Each | |
Inch | ||||
| 1/8" | __ | 316 Stainless Steel | 000000000 | 00000 |
| 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 | 0000 |
| 3/4" | __ | 316 Stainless Steel | 000000000 | 0000 |
| 1" | __ | 316 Stainless Steel | 000000000 | 00000 |
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 |
| 5/8" | 14 | 316 Stainless Steel | 000000000 | 00000 |
| 5/8" | 16 | 316 Stainless Steel | 000000000 | 00000 |
| 3/4" | 18 | 316 Stainless Steel | 000000000 | 00000 |
| 7/8" | 20 | 316 Stainless Steel | 000000000 | 00000 |
| 1" | 25 | 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 | 00000 |
| 1/4" | 3,000 psi @ 72° F | AN929-4J, ASTM A380, SAE AS4841 | 0000000 | 0000 |
| 3/8" | 3,000 psi @ 72° F | AN929-6J, ASTM A380, SAE AS4841 | 0000000 | 0000 |
| 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 | 0000 |
| 3/8" | 3,000 psi @ 72° F | AN929-6K, ASTM A380, SAE AS4841 | 00000000 | 0000 |
| 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 |
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 | 0000 |
| 3/8" | 3,000 psi @ 72° F | AN806-J6, ASTM A380, SAE AS4841 | 0000000 | 0000 |
| 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 |
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 | 0000 |
| 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 |
| 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 |
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 |
| 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 | 0000 |
| 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 |
316 Stainless Steel | ||||
| 1/8" | 3,000 psi @ 72° F | AN818-2K, ASTM A380, SAE AS4841 | 00000000 | 0000 |
| 1/4" | 3,000 psi @ 72° F | AN818-4K, ASTM A380, SAE AS4841 | 00000000 | 0000 |
| 3/8" | 3,000 psi @ 72° F | AN818-6K, ASTM A380, SAE AS4841 | 00000000 | 0000 |
| 1/2" | 3,000 psi @ 72° F | AN818-8K, ASTM A380, SAE AS4841 | 00000000 | 0000 |
| 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 |
Sleeves
| For Tube OD | Max. Pressure | Specifications Met | Each | |
304 Stainless Steel | ||||
|---|---|---|---|---|
| 1/8" | 3,000 psi @ 72° F | AN818-2J, ASTM A380, MS20819, SAE AS4841 | 0000000 | 00000 |
| 1/4" | 3,000 psi @ 72° F | AN819-4J, ASTM A380, MS20819, SAE AS4841 | 0000000 | 0000 |
| 3/8" | 3,000 psi @ 72° F | AN819-6J, ASTM A380, MS20819, SAE AS4841 | 0000000 | 0000 |
| 1/2" | 3,000 psi @ 72° F | AN819-8J, ASTM A380, MS20819, SAE AS4841 | 0000000 | 0000 |
| 3/4" | 3,000 psi @ 72° F | AN819-12J, ASTM A380, MS20819, SAE AS4841 | 0000000 | 0000 |
| 1" | 3,000 psi @ 72° F | AN819-16J, ASTM A380, MS20819, SAE AS4841 | 00000000 | 00000 |
316 Stainless Steel | ||||
| 1/8" | 3,000 psi @ 72° F | AN819-2K, ASTM A380, MS20819, SAE AS4841 | 00000000 | 0000 |
| 1/4" | 3,000 psi @ 72° F | AN819-4K, ASTM A380, MS20819, SAE AS4841 | 00000000 | 0000 |
| 3/8" | 3,000 psi @ 72° F | AN819-6K, ASTM A380, MS20819, SAE AS4841 | 00000000 | 0000 |
| 1/2" | 3,000 psi @ 72° F | AN819-8K, ASTM A380, MS20819, SAE AS4841 | 00000000 | 0000 |
| 3/4" | 3,000 psi @ 72° F | AN819-12K, ASTM A380, MS20819, SAE AS4841 | 00000000 | 0000 |
| 1" | 3,000 psi @ 72° F | AN819-16K, ASTM A380, MS20819, SAE AS4841 | 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.
For technical drawings and 3-D models, click on a part number.
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 | 00000 |
| 3/8" | 316 Stainless Steel | 3,000 psi @ 72° F | AN818-6K, ASTM A380, SAE AS4841 | 00000000 | 0000 |
| 1/2" | 316 Stainless Steel | 3,000 psi @ 72° F | AN818-8K, ASTM A380, SAE AS4841 | 00000000 | 0000 |
| 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 | 0000 |
| 1/2" | 316 Stainless Steel | 3,000 psi @ 72° F | AN819-8K, ASTM A380, MS20819, SAE AS4841 | 00000000 | 0000 |
| 3/4" | 316 Stainless Steel | 3,000 psi @ 72° F | AN819-12K, ASTM A380, MS20819, SAE AS4841 | 00000000 | 0000 |
45° Flared Fittings for Copper and Brass Tubing
- For Use With: Air, Cutting Oil, Diesel Fuel, Fuel Oil, Mineral Oil, Refrigerant, Water
- Temperature Range: -65° to 250° F
- Tubing: Use with seamless brass and copper that meets ASTM B280
- Specifications Met: SAE J512, SAE J513, UL Listed, except socket-connect fittings and fittings with BSPT thread meet SAE J512 and SAE J513 only
No sleeve is required to assemble these fittings, which makes for a faster, more convenient installation compared to 37° flared fittings. They require a nut (sold separately) for each tube end. Fittings are also known as refrigeration and SAE fittings. They are brass for good corrosion resistance.
Copper tube size is the accepted designation of the copper tubing industry, not the actual tube OD.
For technical drawings and 3-D models, click on a part number.
Caps
For Tube | |||||
|---|---|---|---|---|---|
| OD | Wall Thick. | Material | Max. Pressure | Each | |
| 3/16" | 0.03" | Brass | 1,900 psi @ 72° F | 000000000 | 00000 |
| 1/4" | 0.03" | Brass | 1,400 psi @ 72° F | 000000000 | 0000 |
| 5/16" | 0.032" | Brass | 1,200 psi @ 72° F | 000000000 | 0000 |
| 3/8" | 0.032" | Brass | 1,000 psi @ 72° F | 000000000 | 0000 |
| 1/2" | 0.032" | Brass | 750 psi @ 72° F | 000000000 | 0000 |
| 5/8" | 0.035" | Brass | 650 psi @ 72° F | 000000000 | 0000 |
| 3/4" | 0.035" | Brass | 550 psi @ 72° F | 000000000 | 00000 |
Nuts
Short Nut
Long Nut
For Tube | ||||||
|---|---|---|---|---|---|---|
| OD | Wall Thick. | Nut Material | Max. Pressure | Lg. | Each | |
Short Nuts | ||||||
| 3/16" | 0.035" | Brass | 1,900 psi @ 72° F | 5/8" | 000000000 | 00000 |
| 1/4" | 0.049" | Brass | 1,400 psi @ 72° F | 3/4" | 000000000 | 0000 |
| 5/16" | 0.049" | Brass | 1,200 psi @ 72° F | 7/8" | 000000000 | 0000 |
| 3/8" | 0.065" | Brass | 1,000 psi @ 72° F | 1" | 000000000 | 0000 |
| 1/2" | 0.083" | Brass | 750 psi @ 72° F | 1 1/8" | 000000000 | 0000 |
| 5/8" | 0.095" | Brass | 650 psi @ 72° F | 1 5/16" | 000000000 | 0000 |
| 3/4" | 0.109" | Brass | 550 psi @ 72° F | 1 1/2" | 000000000 | 00000 |
Long Nuts | ||||||
| 3/16" | 0.035" | Brass | 1,900 psi @ 72° F | 13/16" | 000000000 | 0000 |
| 1/4" | 0.049" | Brass | 1,400 psi @ 72° F | 15/16" | 000000000 | 0000 |
| 5/16" | 0.049" | Brass | 1,200 psi @ 72° F | 1 1/8" | 000000000 | 0000 |
| 3/8" | 0.065" | Brass | 1,000 psi @ 72° F | 1 5/16" | 000000000 | 0000 |
| 1/2" | 0.083" | Brass | 750 psi @ 72° F | 1 5/8" | 000000000 | 0000 |
| 5/8" | 0.095" | Brass | 650 psi @ 72° F | 1 7/8" | 000000000 | 00000 |
| 3/4" | 0.109" | Brass | 550 psi @ 72° F | 2 3/16" | 000000000 | 00000 |
37° Flared Fittings for Aluminum Tubing
- For Use With: Air, Coolant, Gasoline, Hydraulic Fluid, Water
- Temperature Range: -60° to 400° F
- Tubing: Use with seamless aluminum
Also known as JIC (Joint Industrial Council) fittings, these provide a tight metal-to-metal seal on tubing that is flared to 37°. Fittings are aluminum, which is lightweight with good corrosion resistance. They require a nut and a sleeve (ferrule) for each tube end. Nuts and sleeves are sold separately.
For technical drawings and 3-D models, click on a part number.
Plugs
| For Tube OD | Material | Max. Pressure | Each | |
| 1/4" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 00000 |
| 3/8" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 0000 |
| 1/2" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 0000 |
| 5/8" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 0000 |
| 3/4" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 0000 |
| 1" | Anodized 2024 Aluminum | 1,500 psi @ 72° F | 0000000 | 0000 |
Nuts
| For Tube OD | Nut Material | Max. Pressure | Each | |
| 1/4" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 00000 |
| 3/8" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 0000 |
| 1/2" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 0000 |
| 5/8" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 0000 |
| 3/4" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 0000 |
| 1" | Anodized 2024 Aluminum | 1,500 psi @ 72° F | 0000000 | 0000 |
Sleeves
| For Tube OD | Sleeve Material | Max. Pressure | Each | |
| 1/4" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 00000 |
| 3/8" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 0000 |
| 1/2" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 0000 |
| 5/8" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 0000 |
| 3/4" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 0000 |
| 1" | Anodized 2024 Aluminum | 1,500 psi @ 72° F | 0000000 | 0000 |
30° Flared Fittings for Steel Tubing
- For Use With: Air, Cutting Oil, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Mineral Oil, Water
- Tubing: Use with steel
Also known as JIS (Japanese Industrial Standard) fittings, these have a 30° flare on one or both ends. Fittings are zinc-plated steel for fair corrosion resistance.
