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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 | 00000 |
| 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 | 00000 |
| 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 |
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 | 00000 |
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 |
Threaded Round Plugs for 37° Flared Tube
Polyethylene
Designed to fit into 37° flared connections such as those found on JIC and SAE fittings, these plugs protect internally threaded connections from contaminants during fabrication and storage. Install them manually.
Polyethylene plugs resist chemicals better than aluminum plugs.
For technical drawings and 3-D models, click on a part number.
| Thread Size | For Tube OD | Ht. | Max. Temp., °F | Hardness | Color | Pkg. Qty. | Pkg. | |
Polyethylene Plastic | ||||||||
|---|---|---|---|---|---|---|---|---|
5/16"-24 | 1/8" | 13/32" | 150° | Durometer 40D | Red | 100 | 0000000 | 00000 |
| 3/8"-24 | 3/16" | 15/32" | 150° | Durometer 40D | Red | 100 | 0000000 | 0000 |
| 7/16"-20 | 1/4" | 17/32" | 150° | Durometer 40D | Red | 100 | 0000000 | 0000 |
| 1/2"-20 | 5/16" | 17/32" | 150° | Durometer 40D | Red | 100 | 0000000 | 0000 |
| 9/16"-18 | 3/8" | 1/2" | 150° | Durometer 40D | Red | 100 | 0000000 | 00000 |
| 3/4"-16 | 1/2" | 3/4" | 150° | Durometer 40D | Red | 100 | 0000000 | 00000 |
| 7/8"-14 | 5/8" | 7/8" | 150° | Durometer 40D | Red | 100 | 0000000 | 00000 |
| 1 1/16"-12 | 3/4" | 7/8" | 150° | Durometer 40D | Red | 100 | 0000000 | 00000 |
| 1 5/16"-12 | 1" | 15/16" | 150° | Durometer 40D | Red | 50 | 0000000 | 00000 |