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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.
- For Use With: Air, Hydraulic Fluid, Isopropyl Alcohol, Natural Gas, Phosphoric Acid, Water
- Temperature Range: -420° to 1,200° F
Through-wall fittings are also known as bulkhead couplings and panel-mount couplings; they mount through your wall or panel to create an inlet or outlet.
| For Tube OD | Pipe Size | Material | Max. Pressure | For Hole Dia. | For Max. Wall Thick. | Each | |
NPT Threads | |||||||
|---|---|---|---|---|---|---|---|
| 1/4" | 1/4 | 316 Stainless Steel | 6,000 psi @ 72° F | 1/16" | 21/64" | 000000000 | 000000 |
| 3/8" | 3/8 | 316 Stainless Steel | 6,000 psi @ 72° F | 9/16" | 27/64" | 000000000 | 00000 |
| 1/2" | 1/2 | 316 Stainless Steel | 6,000 psi @ 72° F | 3/4" | 7/16" | 000000000 | 000000 |
| 3/4" | 3/4 | 316 Stainless Steel | 4,500 psi @ 72° F | 1 1/16" | 7/16" | 000000000 | 000000 |
- For Use With: Air, Hydraulic Fluid, Isopropyl Alcohol, Natural Gas, Phosphoric Acid, Water
- Temperature Range: -420° to 1,200° F
Through-wall fittings are also known as bulkhead couplings and panel-mount couplings; they mount through your wall or panel to create an inlet or outlet.
| For Tube OD | Material | Max. Pressure | For Hole Dia. | For Max. Wall Thick. | Each | |
| 1/4" | 316 Stainless Steel | 6,000 psi @ 72° F | 1/2" | 3/8" | 000000000 | 000000 |
| 3/8" | 316 Stainless Steel | 6,000 psi @ 72° F | 5/8" | 7/16" | 000000000 | 00000 |
| 1/2" | 316 Stainless Steel | 6,000 psi @ 72° F | 3/4" | 7/16" | 000000000 | 00000 |
| 5/8" | 316 Stainless Steel | 6,000 psi @ 72° F | 15/16" | 7/16" | 000000000 | 000000 |
| 3/4" | 316 Stainless Steel | 6,000 psi @ 72° F | 1 1/8" | 7/16" | 000000000 | 000000 |
| 1" | 316 Stainless Steel | 4,500 psi @ 72° F | 1 3/8" | 7/16" | 000000000 | 000000 |
- For Use With: Air, Hydraulic Fluid, Isopropyl Alcohol, Natural Gas, Phosphoric Acid, Water
- Temperature Range: -420° to 1,200° F
- 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 | ||||
| 1/4" | __ | 316 Stainless Steel | 000000000 | 00000 |
| 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 | 00000 |
| 1" | __ | 316 Stainless Steel | 000000000 | 00000 |
Inch × Metric | ||||
| 1/4" | 6 | 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.
For technical drawings and 3-D models, click on a part number.
Through-wall fittings are also known as bulkhead couplings and panel-mount couplings; they mount through your wall or panel to create an inlet or outlet.
304 Stainless Steel | 316 Stainless Steel | |||||||
|---|---|---|---|---|---|---|---|---|
| For Tube OD | Max. Pressure | Specifications Met | For Hole Dia. | For Max. Wall Thick. | Each | Each | ||
| 1/8" | 3,000 psi @ 72° F | AN832-2J, ASTM A380, SAE AS4841 | 5/16" | 3/32" | 00000000 | 000000 | 000000 | 00 |
| 1/8" | 3,000 psi @ 72° F | AN832-2K, ASTM A380, SAE AS4841 | 5/16" | 3/32" | 000000 | 00 | 00000000 | 000000 |
| 1/4" | 3,000 psi @ 72° F | AN832-4J, ASTM A380, SAE AS4841 | 7/16" | 3/32" | 00000000 | 00000 | 000000 | 00 |
| 1/4" | 3,000 psi @ 72° F | AN832-4K, ASTM A380, SAE AS4841 | 7/16" | 3/32" | 000000 | 00 | 00000000 | 00000 |
| 3/8" | 3,000 psi @ 72° F | AN832-6J, ASTM A380, SAE AS4841 | 9/16" | 3/32" | 00000000 | 00000 | 000000 | 00 |
| 3/8" | 3,000 psi @ 72° F | AN832-6K, ASTM A380, SAE AS4841 | 9/16" | 3/32" | 000000 | 00 | 00000000 | 00000 |
| 1/2" | 3,000 psi @ 72° F | AN832-8J, ASTM A380, SAE AS4841 | 3/4" | 1/8" | 00000000 | 00000 | 000000 | 00 |
| 1/2" | 3,000 psi @ 72° F | AN832-8K, ASTM A380, SAE AS4841 | 3/4" | 1/8" | 000000 | 00 | 00000000 | 00000 |
| 3/4" | 3,000 psi @ 72° F | AN832-12J, ASTM A380, SAE AS4841 | 1 1/16" | 5/32" | 00000000 | 00000 | 000000 | 00 |
| 3/4" | 3,000 psi @ 72° F | AN832-12K, ASTM A380, SAE AS4841 | 1 1/16" | 5/32" | 000000 | 00 | 00000000 | 00000 |
| 1" | 3,000 psi @ 72° F | AN832-16J, ASTM A380, SAE AS4841 | 1 5/16" | 11/64" | 00000000 | 00000 | 000000 | 00 |
| 1" | 3,000 psi @ 72° F | AN832-16K, ASTM A380, SAE AS4841 | 1 5/16" | 11/64" | 000000 | 00 | 00000000 | 000000 |
Through-wall fittings are also known as bulkhead couplings and panel-mount couplings; they mount through your wall or panel to create an inlet or outlet.
304 Stainless Steel | 316 Stainless Steel | |||||||
|---|---|---|---|---|---|---|---|---|
| For Tube OD | Max. Pressure | For Hole Dia. | For Max. Wall Thick. | Specifications Met | Each | Each | ||
| 1/4" | 3,000 psi @ 72° F | 7/16" | 3/32" | AN833-4J, ASTM A380, SAE AS4841 | 00000000 | 000000 | 000000 | 00 |
| 1/4" | 3,000 psi @ 72° F | 7/16" | 3/32" | AN833-4K, ASTM A380, SAE AS4841 | 000000 | 00 | 00000000 | 000000 |
| 3/8" | 3,000 psi @ 72° F | 9/16" | 3/32" | AN833-6J, ASTM A380, SAE AS4841 | 00000000 | 00000 | 000000 | 00 |
| 3/8" | 3,000 psi @ 72° F | 9/16" | 3/32" | AN833-6K, ASTM A380, SAE AS4841 | 000000 | 00 | 00000000 | 00000 |
| 1/2" | 3,000 psi @ 72° F | 3/4" | 1/8" | AN833-8J, ASTM A380, SAE AS4841 | 00000000 | 00000 | 000000 | 00 |
| 1/2" | 3,000 psi @ 72° F | 3/4" | 1/8" | AN833-8K, ASTM A380, SAE AS4841 | 000000 | 00 | 00000000 | 00000 |
| 3/4" | 3,000 psi @ 72° F | 1 1/16" | 5/32" | AN833-12J, ASTM A380, SAE AS4841 | 00000000 | 00000 | 000000 | 00 |
| 3/4" | 3,000 psi @ 72° F | 1 1/16" | 5/32" | AN833-12K, ASTM A380, SAE AS4841 | 000000 | 00 | 00000000 | 000000 |
| 1" | 3,000 psi @ 72° F | 1 5/16" | 11/64" | AN833-16J, ASTM A380, SAE AS4841 | 00000000 | 000000 | 000000 | 00 |
| 1" | 3,000 psi @ 72° F | 1 5/16" | 11/64" | AN833-16K, ASTM A380, SAE AS4841 | 000000 | 00 | 00000000 | 000000 |
304 Stainless Steel | 316 Stainless Steel | |||||
|---|---|---|---|---|---|---|
| For Tube OD | Max. Pressure | Specifications Met | Each | Each | ||
| 1/8" | 3,000 psi @ 72° F | AN818-2J, ASTM A380, SAE AS4841 | 0000000 | 00000 | 000000 | 00 |
| 1/8" | 3,000 psi @ 72° F | AN818-2K, ASTM A380, SAE AS4841 | 000000 | 00 | 00000000 | 00000 |
| 1/4" | 3,000 psi @ 72° F | AN818-4J, ASTM A380, SAE AS4841 | 0000000 | 0000 | 000000 | 00 |
| 1/4" | 3,000 psi @ 72° F | AN818-4K, ASTM A380, SAE AS4841 | 000000 | 00 | 00000000 | 0000 |
| 3/8" | 3,000 psi @ 72° F | AN818-6J, ASTM A380, SAE AS4841 | 0000000 | 0000 | 000000 | 00 |
| 3/8" | 3,000 psi @ 72° F | AN818-6K, ASTM A380, SAE AS4841 | 000000 | 00 | 00000000 | 0000 |
| 1/2" | 3,000 psi @ 72° F | AN818-8J, ASTM A380, SAE AS4841 | 0000000 | 0000 | 000000 | 00 |
| 1/2" | 3,000 psi @ 72° F | AN818-8K, ASTM A380, SAE AS4841 | 000000 | 00 | 00000000 | 0000 |
| 3/4" | 3,000 psi @ 72° F | AN818-12J, ASTM A380, SAE AS4841 | 0000000 | 00000 | 000000 | 00 |
| 3/4" | 3,000 psi @ 72° F | AN818-12K, ASTM A380, SAE AS4841 | 000000 | 00 | 00000000 | 00000 |
| 1" | 3,000 psi @ 72° F | AN818-16J, ASTM A380, SAE AS4841 | 00000000 | 00000 | 000000 | 00 |
| 1" | 3,000 psi @ 72° F | AN818-16K, ASTM A380, SAE AS4841 | 000000 | 00 | 00000000 | 00000 |
304 Stainless Steel | 316 Stainless Steel | |||||
|---|---|---|---|---|---|---|
| For Tube OD | Max. Pressure | Specifications Met | Each | Each | ||
| 1/8" | 3,000 psi @ 72° F | AN818-2J, ASTM A380, MS20819, SAE AS4841 | 0000000 | 00000 | 000000 | 00 |
| 1/8" | 3,000 psi @ 72° F | AN819-2K, ASTM A380, MS20819, SAE AS4841 | 000000 | 00 | 00000000 | 00000 |
| 1/4" | 3,000 psi @ 72° F | AN819-4J, ASTM A380, MS20819, SAE AS4841 | 0000000 | 0000 | 000000 | 00 |
| 1/4" | 3,000 psi @ 72° F | AN819-4K, ASTM A380, MS20819, SAE AS4841 | 000000 | 00 | 00000000 | 0000 |
| 3/8" | 3,000 psi @ 72° F | AN819-6J, ASTM A380, MS20819, SAE AS4841 | 0000000 | 0000 | 000000 | 00 |
| 3/8" | 3,000 psi @ 72° F | AN819-6K, ASTM A380, MS20819, SAE AS4841 | 000000 | 00 | 00000000 | 0000 |
| 1/2" | 3,000 psi @ 72° F | AN819-8J, ASTM A380, MS20819, SAE AS4841 | 0000000 | 0000 | 000000 | 00 |
| 1/2" | 3,000 psi @ 72° F | AN819-8K, ASTM A380, MS20819, SAE AS4841 | 000000 | 00 | 00000000 | 0000 |
| 3/4" | 3,000 psi @ 72° F | AN819-12J, ASTM A380, MS20819, SAE AS4841 | 0000000 | 0000 | 000000 | 00 |
| 3/4" | 3,000 psi @ 72° F | AN819-12K, ASTM A380, MS20819, SAE AS4841 | 000000 | 00 | 00000000 | 0000 |
| 1" | 3,000 psi @ 72° F | AN819-16J, ASTM A380, MS20819, SAE AS4841 | 00000000 | 00000 | 000000 | 00 |
| 1" | 3,000 psi @ 72° F | AN819-16K, ASTM A380, MS20819, SAE AS4841 | 000000 | 00 | 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.
Through-wall fittings are also known as bulkhead couplings and panel-mount couplings; they mount through your wall or panel to create an inlet or outlet.
| For Tube OD | Material | Max. Pressure | Specifications Met | For Hole Dia. | For Max. Wall Thick. | Each | |
| 1/4" | 316 Stainless Steel | 3,000 psi @ 72° F | AN832-4K, ASTM A380, SAE AS9100D, SAE AS9104/1 | 7/16" | 3/32" | 00000000 | 000000 |
| 3/8" | 316 Stainless Steel | 3,000 psi @ 72° F | AN832-6K, ASTM A380, SAE AS9100D, SAE AS9104/1 | 9/16" | 3/32" | 00000000 | 00000 |
| 1/2" | 316 Stainless Steel | 3,000 psi @ 72° F | AN832-8K, ASTM A380, SAE AS9100D, SAE AS9104/1 | 3/4" | 1/8" | 00000000 | 00000 |
| 3/4" | 316 Stainless Steel | 3,000 psi @ 72° F | AN832-12K, ASTM A380, SAE AS9100D, SAE AS9104/1 | 1 1/16" | 5/32" | 00000000 | 000000 |
| 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 |
| 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 |
37° Flared Fittings for Steel Tubing
- Tubing: Use with seamless steel
- Specifications Met: SAE J514
Also known as JIC (Joint Industrial Council) fittings, these provide a tight metal-to-metal seal on tubing that is flared to 37°. They require a nut and a sleeve (ferrule) for each tube end. Nuts and sleeves are sold separately. Fittings are zinc-plated steel for fair corrosion resistance.
NPTF (Dryseal) threads are compatible with NPT threads.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Cutting Oil, Fuel Oil, Hydraulic Fluid, Mineral Oil
- Temperature Range: -60° to 400° F
Through-wall fittings are also known as bulkhead couplings and panel-mount couplings; they mount through your wall or panel to create an inlet or outlet.
- For Use With: Air, Cutting Oil, Fuel Oil, Hydraulic Fluid, Mineral Oil
- Temperature Range: -60° to 400° F
Through-wall fittings are also known as bulkhead couplings and panel-mount couplings; they mount through your wall or panel to create an inlet or outlet.
- For Use With: Air, Fuel Oil, Hydraulic Fluid, Mineral Oil
- Temperature Range: -60° to 400° F
Use these sleeves with a nut and fitting to provide a tight metal-to-metal seal on steel tubing that is flared to 37°. Sleeves are zinc-plated steel for fair corrosion resistance. They are also known as ferrules.
- For Use With: Air, Fuel Oil, Hydraulic Fluid, Mineral Oil
- Temperature Range: -60° to 400° F