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.
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: -380° to 800° F
Right-angle tees are also known as run tees.
| For Tube OD | Pipe Size | Material | Max. Pressure | Each | |
NPT Threads | |||||
|---|---|---|---|---|---|
| 1/4" | 1/4 | 316 Stainless Steel | 5,000 psi @ 72° F | 000000000 | 000000 |
- For Use With: Air, Hydraulic Fluid, Isopropyl Alcohol, Natural Gas, Phosphoric Acid, Water
- Temperature Range: -420° to 1,200° F
Right-angle tees are also known as run tees.
Fittings that swivel until tightened have a built-in nut that rotates 360° for easy installation.
Fittings with female tube end have an internal flare that mates with the male tube end of another fitting.
| For Tube OD | Material | Max. Pressure | Each | |
| 1/4" | 316 Stainless Steel | 5,000 psi @ 72° F | 000000000 | 000000 |
| 5/16" | 316 Stainless Steel | 5,000 psi @ 72° F | 000000000 | 000000 |
| 3/8" | 316 Stainless Steel | 4,500 psi @ 72° F | 000000000 | 00000 |
| 1/2" | 316 Stainless Steel | 4,000 psi @ 72° F | 000000000 | 000000 |
| 5/8" | 316 Stainless Steel | 4,000 psi @ 72° F | 000000000 | 000000 |
| 3/4" | 316 Stainless Steel | 3,500 psi @ 72° F | 000000000 | 000000 |
| 1" | 316 Stainless Steel | 2,500 psi @ 72° F | 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 |
| 5/16" | __ | 316 Stainless Steel | 000000000 | 0000 |
| 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 |
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.
316 stainless steel fittings have excellent corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Fittings that swivel until tightened have a built-in nut that rotates 360° for easy installation.
Right-angle tees are also known as run tees.
Fittings with female tube end have an internal flare that mates with the male tube end of another fitting.
45° Flared Fittings for Copper and Brass Tubing
- Temperature Range: -65° to 250° F
- Tubing: Use with seamless brass and copper that meets ASTM B280
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.
NPTF (Dryseal) threads are compatible with NPT threads.
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.
- For Use With: Air, Cutting Oil, Diesel Fuel, Fuel Oil, Mineral Oil, Refrigerant, Water
- Specifications Met: SAE J512, SAE J513, UL Listed
Right-angle tees are also known as run tees.
For Tube | ||||||
|---|---|---|---|---|---|---|
| OD | Wall Thick. | Pipe Size | Material | Max. Pressure | Each | |
NPTF Threads | ||||||
| 1/4" | 0.03" | 1/8 | Brass | 1,400 psi @ 72° F | 000000000 | 000000 |
| 1/4" | 0.03" | 1/4 | Brass | 1,400 psi @ 72° F | 000000000 | 00000 |
| 5/16" | 0.032" | 1/4 | Brass | 1,200 psi @ 72° F | 000000000 | 00000 |
| 3/8" | 0.032" | 1/4 | Brass | 1,000 psi @ 72° F | 000000000 | 00000 |
| 3/8" | 0.032" | 3/8 | Brass | 1,000 psi @ 72° F | 000000000 | 00000 |
| 3/8" | 0.032" | 1/2 | Brass | 1,000 psi @ 72° F | 000000000 | 00000 |
| 1/2" | 0.032" | 3/8 | Brass | 750 psi @ 72° F | 000000000 | 00000 |
| 1/2" | 0.032" | 1/2 | Brass | 750 psi @ 72° F | 000000000 | 00000 |
| 5/8" | 0.035" | 1/2 | Brass | 650 psi @ 72° F | 000000000 | 00000 |
- For Use With: Air, Cutting Oil, Diesel Fuel, Fuel Oil, Mineral Oil, Refrigerant, Water; except nuts for 1" tube OD are not for use with fuel oil
- Specifications Met: SAE J512, SAE J513, UL Listed; except nuts for 1" tube OD meet SAE J512 and SAE J513 only
For Tube | |||||||
|---|---|---|---|---|---|---|---|
| OD | Wall Thick. | Nut Material | Max. Pressure | Lg. | Each | ||
Short Nuts | |||||||
| A | 1/4" | 0.049" | Brass | 1,400 psi @ 72° F | 3/4" | 000000000 | 00000 |
| A | 5/16" | 0.049" | Brass | 1,200 psi @ 72° F | 7/8" | 000000000 | 0000 |
| A | 3/8" | 0.032" | Brass | 1,000 psi @ 72° F | 29/32" | 000000000 | 0000 |
| A | 3/8" | 0.065" | Brass | 1,000 psi @ 72° F | 1" | 000000000 | 0000 |
| A | 1/2" | 0.032" | Brass | 750 psi @ 72° F | 1" | 000000000 | 0000 |
| A | 1/2" | 0.083" | Brass | 750 psi @ 72° F | 1 1/8" | 000000000 | 0000 |
| A | 5/8" | 0.035" | Brass | 650 psi @ 72° F | 1 1/16" | 000000000 | 00000 |
| A | 5/8" | 0.095" | Brass | 650 psi @ 72° F | 1 5/16" | 000000000 | 00000 |
| B | 1/4" | 0.03" | Brass | 1,400 psi @ 72° F | 5/8" | 00000000 | 0000 |
| B | 1/2" | 0.032" | Brass | 750 psi @ 72° F | 27/32" | 000000000 | 0000 |
| B | 5/8" | 0.035" | Brass | 650 psi @ 72° F | 31/32" | 000000000 | 00000 |
Long Nuts | |||||||
| A | 1/4" | 0.049" | Brass | 1,400 psi @ 72° F | 15/16" | 000000000 | 0000 |
| A | 5/16" | 0.049" | Brass | 1,200 psi @ 72° F | 1 1/8" | 000000000 | 0000 |
| A | 3/8" | 0.065" | Brass | 1,000 psi @ 72° F | 1 5/16" | 000000000 | 0000 |
| A | 1/2" | 0.083" | Brass | 750 psi @ 72° F | 1 5/8" | 000000000 | 00000 |
| A | 5/8" | 0.095" | Brass | 650 psi @ 72° F | 1 7/8" | 000000000 | 00000 |
37° Flared Fittings for Steel Tubing
- For Use With: Air, Cutting Oil, Fuel Oil, Hydraulic Fluid, Mineral Oil
- 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.
For technical drawings and 3-D models, click on a part number.
- Temperature Range: -60° to 400° F
Fittings that swivel until tightened have a built-in nut that rotates 360° for easy installation.
Fittings with female tube end have an internal flare that mates with the male tube end of another fitting.
Right-angle tees are also known as run tees.
| For Tube OD | Material | Max. Pressure | Each | |
| 1/4" | Zinc-Plated Steel | 1,250 psi @ 72° F | 000000000 | 000000 |
| 5/16" | Zinc-Plated Steel | 6,000 psi @ 72° F | 000000000 | 00000 |
| 3/8" | Zinc-Plated Steel | 1,250 psi @ 72° F | 000000000 | 00000 |
| 1/2" | Zinc-Plated Steel | 1,250 psi @ 72° F | 000000000 | 00000 |
| 3/4" | Zinc-Plated Steel | 1,250 psi @ 72° F | 000000000 | 00000 |
| 1" | Zinc-Plated Steel | 4,000 psi @ 72° F | 000000000 | 00000 |
- 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.
Inch × metric sleeve adapters convert the fitting from inch to metric.
For Tube OD | |||||
|---|---|---|---|---|---|
| Inch | Metric, mm | Sleeve Material | Max. Pressure | Each | |
Inch Sleeves | |||||
| 1/4" | __ | Zinc-Plated Steel | 4,500 psi @ 72° F | 000000000 | 00000 |
| 5/16" | __ | Zinc-Plated Steel | 4,000 psi @ 72° F | 000000000 | 0000 |
| 3/8" | __ | Zinc-Plated Steel | 4,000 psi @ 72° F | 000000000 | 000 |
| 1/2" | __ | Zinc-Plated Steel | 4,000 psi @ 72° F | 000000000 | 0000 |
| 3/4" | __ | Zinc-Plated Steel | 3,000 psi @ 72° F | 000000000 | 0000 |
| 1" | __ | Zinc-Plated Steel | 2,500 psi @ 72° F | 000000000 | 0000 |
Inch × Metric Sleeve Adapters | |||||
| 5/16" | 8 | Zinc-Plated Steel | 4,000 psi @ 72° F | 000000000 | 0000 |
- Temperature Range: -60° to 400° F
| For Tube OD | Nut Material | Max. Pressure | Each | |
| 3/16" | Zinc-Plated Steel | 1,200 psi @ 72° F | 00000000 | 00000 |
| 1/4" | Zinc-Plated Steel | 4,500 psi @ 72° F | 000000000 | 000 |
| 5/16" | Zinc-Plated Steel | 4,000 psi @ 72° F | 000000000 | 0000 |
| 3/8" | Zinc-Plated Steel | 4,000 psi @ 72° F | 000000000 | 000 |
| 1/2" | Zinc-Plated Steel | 4,000 psi @ 72° F | 000000000 | 0000 |
| 3/4" | Zinc-Plated Steel | 3,000 psi @ 72° F | 000000000 | 0000 |
| 1" | Zinc-Plated Steel | 2,500 psi @ 72° F | 000000000 | 0000 |