How to Identify and Measure 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.
- 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 | 00000 |
| 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 |
37° Flared Fittings with Thread Sealant for Stainless Steel Tubing
- For Use With: Air, Hydraulic Fluid, Isopropyl Alcohol, Natural Gas, Phosphoric Acid, Water
- Temperature Range:
Adapters: -420° to 450° F
Sleeves and Nuts: -420° to 1,200° F - Tubing: Use with seamless or welded 304 or 316 stainless steel that meets ASTM A213, ASTM A249, or ASTM A269
- Specifications Met: ISO 8434, SAE J514, except fittings with BSPT threads meet SAE J514 only
The male pipe threads on these fittings have a sealant applied for extra protection against leaks. Also known as JIC (Joint Industrial Council) fittings, they provide a tight metal-to-metal seal on tubing that is flared to 37°. They’re often used in hydraulic applications. Made from 316 stainless steel, these fittings have excellent corrosion resistance. A complete fitting requires a nut and a sleeve (ferrule) for each tube end—tighten the nut to create a secure seal that withstands high pressure. Nuts and sleeves are sold separately.
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.
Compression Fittings for Stainless Steel Tubing
A single sleeve (ferrule) bites into tubing as you tighten the nut, creating a strong seal. The nut and sleeve are included. Fittings are also known as flareless fittings or bite fittings. Use them in low- to medium-pressure applications.
316 stainless steel fittings have excellent corrosion resistance.
ISO and DIN fittings meet international dimensional standards.
- For Use With:
316 Stainless Steel with 17-4 PH Stainless Steel Sleeve: Air, Water, Hydraulic Fluid
316 Stainless Steel: Air, Cutting Oil, Ethyl Alcohol, Fuel Oil, Gasoline, Hydraulic Fluid, Isopropyl Alcohol, Mineral Oil, Natural Gas, Steam, Water - Temperature Range:
316 Stainless Steel with 17-4 PH Stainless Steel Sleeve: -420° to 1200° F
316 Stainless Steel: -75° to 750° F - Tubing:
316 Stainless Steel with 17-4 PH Stainless Steel Sleeve: Use with welded or seamless 304 or 316 stainless steel that meets ASTM A269
316 Stainless Steel: Use with seamless 304 or 316/316L/316Ti stainless steel that meets DIN EN 10216-5 or DIN EN 10305-1 - Specifications Met:
316 Stainless Steel with 17-4 PH Stainless Steel Sleeve: SAE J514
316 Stainless Steel: ISO 8434, DIN 2353
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 | Wall Thick. | Material | Sleeve Material | Max. Pressure | Temp. Range, °F | For Hole Dia. | For Max. Wall Thick. | Each | |
| 6mm | 1mm | 316 Stainless Steel | 316 Stainless Steel | 7,200 psi @ 72° F | -75° to 750° | 14mm | 20mm | 0000000 | 000000 |
| 8mm | 1-1.5mm | 316 Stainless Steel | 316 Stainless Steel | 7,200 psi @ 72° F | -75° to 750° | 16mm | 19mm | 0000000 | 00000 |
| 10mm | 1-2mm | 316 Stainless Steel | 316 Stainless Steel | 7,200 psi @ 72° F | -75° to 750° | 18mm | 18mm | 0000000 | 00000 |
- For Use With: See table
- Temperature Range: See table
- Tubing: See table
- Specifications Met: See table
For Tube | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| OD | Wall Thick. | Nut Material | Max. Pressure | For Use With | Temp. Range, °F | For Tube Material | For Tube Specifications Met | For Tube Fabrication | Specifications Met | Each | |
| 6mm | 1mm | 316 Stainless Steel | 7,200 psi @ 72° F | Air, Cutting Oil, Ethyl Alcohol, Fuel Oil, Gasoline, Hydraulic Fluid, Isopropyl Alcohol, Mineral Oil, Natural Gas, Steam, Water | -75° to 750° | 304 Stainless Steel, 316/316L/316Ti Stainless Steel | DIN EN 10216-5, DIN EN 10305-1 | Seamless | DIN 2353, ISO 8434-1 | 0000000 | 00000 |
| 8mm | 1-1.5mm | 316 Stainless Steel | 7,200 psi @ 72° F | Air, Cutting Oil, Ethyl Alcohol, Fuel Oil, Gasoline, Hydraulic Fluid, Isopropyl Alcohol, Mineral Oil, Natural Gas, Steam, Water | -75° to 750° | 304 Stainless Steel, 316/316L/316Ti Stainless Steel | DIN EN 10216-5, DIN EN 10305-1 | Seamless | DIN 2353, ISO 8434-1 | 0000000 | 0000 |
| 10mm | 1-2mm | 316 Stainless Steel | 7,200 psi @ 72° F | Air, Cutting Oil, Ethyl Alcohol, Fuel Oil, Gasoline, Hydraulic Fluid, Isopropyl Alcohol, Mineral Oil, Natural Gas, Steam, Water | -75° to 750° | 304 Stainless Steel, 316/316L/316Ti Stainless Steel | DIN EN 10216-5, DIN EN 10305-1 | Seamless | DIN 2353, ISO 8434-1 | 0000000 | 0000 |
Precision Compression Fittings for Stainless Steel Tubing
- For Use With: Air, Cutting Oil, Ethyl Alcohol, Fuel Oil, Gasoline, Hydraulic Fluid, Isopropyl Alcohol, Mineral Oil, Natural Gas, Steam, Water
- Temperature Range: -420° to 1200° F
- Tubing: Use with welded or seamless 304 or 316 stainless steel that meets ASTM A213, ASTM A249, or ASTM A269
- Compatible With: Parker CPI
Made to tighter tolerances than other compression fittings, these are designed for high-precision applications. Also known as instrumentation fittings and flareless fittings. They come with a nut and a single sleeve (ferrule). The sleeve bites into tubing as you tighten the nut to create a strong seal. Fittings are 316 stainless steel for excellent corrosion resistance. A molybdenum disulfide coating on the nut acts as a lubricant for easy installation.
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 | Wall Thick. | Material | Max. Pressure | For Hole Dia. | For Max. Wall Thick. | Each | |
| 1/8" | 0.035" | 316 Stainless Steel | 5,500 psi @ 72° F | 5/16" | 1/2" | 00000000 | 000000 |
| 3/16" | 0.035" | 316 Stainless Steel | 5,500 psi @ 72° F | 3/8" | 1/2" | 00000000 | 00000 |
| 1/4" | 0.035" | 316 Stainless Steel | 4,000 psi @ 72° F | 7/16" | 17/32" | 00000000 | 00000 |
| 5/16" | 0.035" | 316 Stainless Steel | 3,200 psi @ 72° F | 1/2" | 9/16" | 00000000 | 00000 |
| 3/8" | 0.035" | 316 Stainless Steel | 2,600 psi @ 72° F | 9/16" | 9/16" | 00000000 | 00000 |
| 1/2" | 0.035" | 316 Stainless Steel | 2,100 psi @ 72° F | 3/4" | 19/32" | 0000000 | 00000 |
| 5/8" | 0.049" | 316 Stainless Steel | 2,100 psi @ 72° F | 7/8" | 19/32" | 0000000 | 00000 |
| 3/4" | 0.049" | 316 Stainless Steel | 2,100 psi @ 72° F | 1" | 25/32" | 0000000 | 000000 |
For Tube | ||||
|---|---|---|---|---|
| OD | Wall Thick. | Nut Material | Max. Pressure | |
| 3/16" | 0.035" | Molybdenum-Disulfide-Coated 316 Stainless Steel | 5,500 psi @ 72° F | 00000000 |
| 1/4" | 0.035" | Molybdenum-Disulfide-Coated 316 Stainless Steel | 4,000 psi @ 72° F | 00000000 |
| 5/16" | 0.035" | Molybdenum-Disulfide-Coated 316 Stainless Steel | 3,200 psi @ 72° F | 00000000 |
| 3/8" | 0.035" | Molybdenum-Disulfide-Coated 316 Stainless Steel | 2,600 psi @ 72° F | 00000000 |
| 1/2" | 0.035" | Molybdenum-Disulfide-Coated 316 Stainless Steel | 2,100 psi @ 72° F | 00000000 |
| 5/8" | 0.049" | Molybdenum-Disulfide-Coated 316 Stainless Steel | 2,100 psi @ 72° F | 00000000 |
| 3/4" | 0.049" | Molybdenum-Disulfide-Coated 316 Stainless Steel | 2,100 psi @ 72° F | 00000000 |
For Tube | ||||
|---|---|---|---|---|
| OD | Wall Thick. | Sleeve Material | Max. Pressure | |
| 1/8" | 0.035" | 316 Stainless Steel | 5,500 psi @ 72° F | 00000000 |
| 3/16" | 0.035" | 316 Stainless Steel | 5,500 psi @ 72° F | 00000000 |
| 1/4" | 0.035" | 316 Stainless Steel | 4,000 psi @ 72° F | 00000000 |
| 5/16" | 0.035" | 316 Stainless Steel | 3,200 psi @ 72° F | 00000000 |
| 3/8" | 0.035" | 316 Stainless Steel | 2,600 psi @ 72° F | 00000000 |
| 1/2" | 0.035" | 316 Stainless Steel | 2,100 psi @ 72° F | 00000000 |
| 5/8" | 0.049" | 316 Stainless Steel | 2,100 psi @ 72° F | 00000000 |
| 3/4" | 0.049" | 316 Stainless Steel | 2,100 psi @ 72° F | 00000000 |
Precision Compression Fittings for Copper Tubing
- For Use With: Air, Cutting Oil, Ethyl Alcohol, Fuel Oil, Gasoline, Hydraulic Fluid, Isopropyl Alcohol, Mineral Oil, Natural Gas, Steam, Water
- Temperature Range: -40° to 350° F
- Tubing: Use with seamless copper that meets ASTM B68, ASTM B75, or ASTM B88
- Compatible With: Parker CPI
Made to tighter tolerances than other compression fittings, these are designed for high-precision applications. They are also known as instrumentation fittings and flareless fittings. They come with a nut and a single sleeve (ferrule). The sleeve bites into tubing as you tighten the nut to create a strong seal. Fittings are brass for good corrosion resistance.
Fittings with a molybdenum-disulfide brass nut are easy to install because the coating acts as a lubricant.
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 | Wall Thick. | Material | Nut Material | Max. Pressure | For Hole Dia. | For Max. Wall Thick. | Each | |
| 1/8" | 0.035" | Brass | Molybdenum-Disulfide-Coated Brass | 2,700 psi @ 72° F | 5/16" | 1/2" | 00000000 | 000000 |
| 1/4" | 0.035" | Brass | Molybdenum-Disulfide-Coated Brass | 1,200 psi @ 72° F | 7/16" | 17/32" | 00000000 | 00000 |
| 5/16" | 0.035" | Brass | Brass | 1,200 psi @ 72° F | 1/2" | 7/16" | 00000000 | 00000 |
| 3/8" | 0.035" | Brass | Molybdenum-Disulfide-Coated Brass | 1,000 psi @ 72° F | 9/16" | 9/16" | 00000000 | 00000 |
| 1/2" | 0.049" | Brass | Brass | 1,100 psi @ 72° F | 3/4" | 1/2" | 00000000 | 00000 |
| 5/8" | 0.065" | Brass | Molybdenum-Disulfide-Coated Brass | 1,300 psi @ 72° F | 7/8" | 19/32" | 00000000 | 00000 |
For Tube | |||||
|---|---|---|---|---|---|
| OD | Wall Thick. | Nut Material | Max. Pressure | Each | |
| 1/8" | 0.035" | Molybdenum-Disulfide-Coated Brass | 2,700 psi @ 72° F | 00000000 | 00000 |
| 1/4" | 0.035" | Molybdenum-Disulfide-Coated Brass | 1,200 psi @ 72° F | 00000000 | 0000 |
| 5/16" | 0.035" | Brass | 1,200 psi @ 72° F | 00000000 | 0000 |
| 3/8" | 0.035" | Molybdenum-Disulfide-Coated Brass | 1,000 psi @ 72° F | 00000000 | 0000 |
| 1/2" | 0.049" | Molybdenum-Disulfide-Coated Brass | 1,200 psi @ 72° F | 00000000 | 0000 |
| 5/8" | 0.065" | Molybdenum-Disulfide-Coated Brass | 1,300 psi @ 72° F | 00000000 | 0000 |
For Tube | |||||
|---|---|---|---|---|---|
| OD | Wall Thick. | Sleeve Material | Max. Pressure | Each | |
| 1/8" | 0.035" | Brass | 2,700 psi @ 72° F | 00000000 | 00000 |
| 1/4" | 0.035" | Brass | 1,200 psi @ 72° F | 00000000 | 0000 |
| 5/16" | 0.035" | Brass | 1,200 psi @ 72° F | 00000000 | 0000 |
| 3/8" | 0.035" | Brass | 1,000 psi @ 72° F | 00000000 | 0000 |
| 1/2" | 0.049" | Brass | 1,200 psi @ 72° F | 00000000 | 0000 |
| 5/8" | 0.065" | Brass | 1,300 psi @ 72° F | 00000000 | 0000 |