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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High-Pressure Stainless Steel Threaded SAE Pipe Flanges
Also known as Code 61 SAE hydraulic flanges, these let you create an access point in a high-pressure hydraulic line. To connect, bolt flanges to equipment, or bolt a flange with an O-ring groove surface to a flange with a flat surface of the same size. Flanges are 316 stainless steel for excellent corrosion resistance. UN/UNF (SAE Straight) threads are also known as O-ring boss threads.
For technical drawings and 3-D models, click on a part number.
- Specifications Met: SAE J518, ISO 6162
- For Use With: Hydraulic Fluid
Flange | Bolt Hole | 316/316L Stainless Steel | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size  | SAE Flange Size | Dash Size | Max. Pressure | Ht. | Wd. | Dp. | Mounting Hardware Included | For Bolt Dia. | Dia. | No. of | Ctr.-to-Ctr. | Each | |
UN/UNF (SAE Straight) | |||||||||||||
| 2 1/2"-12 | 2 | 32 | 3,000 psi @ 72° F | 4" | 3 1/4" | 1 45/64" | No | 1/2" | 0.531" | 4 | 1.688", 3.062" | 0000000 | 0000000 |
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: See table
- Temperature Range: See table
| For Tube OD | Pipe Size | For Use With | Material | Max. Pressure | Temp. Range, °F | Each | |
NPT Threads | |||||||
|---|---|---|---|---|---|---|---|
| 2" | 2 | Air, Hydraulic Fluid, Isopropyl Alcohol, Natural Gas, Phosphoric Acid, Water | 316 Stainless Steel | 1,500 psi @ 72° F | -420° to 1200° | 000000000 | 0000000 |
- 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 | |
| 2" | 316 Stainless Steel | 000000000 | 0000000 |
- 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.
For Tube OD | |||
|---|---|---|---|
| Inch | Sleeve Material | Each | |
Inch | |||
| 2" | 316 Stainless Steel | 000000000 | 0000000 |
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.
For technical drawings and 3-D models, click on a part number.
| For Tube OD | Pipe Size | Max. Pressure | Specifications Met | Each | |
304 Stainless Steel | |||||
|---|---|---|---|---|---|
ANPT Threads | |||||
| 2" | 2 | 1,500 psi @ 72° F | AN816-32J, ASTM A380, SAE AS4841 | 00000000 | 0000000 |
| For Tube OD | Max. Pressure | Specifications Met | Each | |
304 Stainless Steel | ||||
|---|---|---|---|---|
| 2" | 1,500 psi @ 72° F | AN818-32J, ASTM A380, SAE AS4841 | 00000000 | 0000000 |
| For Tube OD | Max. Pressure | Specifications Met | Each | |
304 Stainless Steel | ||||
|---|---|---|---|---|
| 2" | 1,500 psi @ 72° F | AN819-32J, ASTM A380, MS20819, SAE AS4841, SAE AS5176 | 00000000 | 000000 |
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.
NPTF (Dryseal) threads are compatible with NPT threads.
For technical drawings and 3-D models, click on a part number.
- Temperature Range: See table
| For Tube OD | Pipe Size | Material | Max. Pressure | Temp. Range, °F | Each | |
NPTF Threads | ||||||
|---|---|---|---|---|---|---|
| 2" | 2 | Zinc-Plated Steel | 1,100 psi @ 72° F | -60° to 400° | 00000000 | 000000 |
- Temperature Range: -60° to 400° F
| For Tube OD | Pipe Size | Material | Max. Pressure | Each | |
NPTF Threads | |||||
|---|---|---|---|---|---|
| 2" | 2 | Zinc-Plated Steel | 1,100 psi @ 72° F | 00000000 | 000000 |
- 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.
| For Tube OD | Pipe Size | Material | Max. Pressure | Each | |
NPTF Threads | |||||
|---|---|---|---|---|---|
| 2" | 2 | Zinc-Plated Steel | 1,500 psi @ 72° F | 000000000 | 0000000 |
- Temperature Range: -60° to 400° F
| For Tube OD | Material | Max. Pressure | Each | |
| 2" | Zinc-Plated Steel | 1,125 psi @ 72° F | 000000000 | 000000 |
- 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 Tube OD | Material | Max. Pressure | Each | |
| 2" | Zinc-Plated Steel | 2,000 psi @ 72° F | 000000000 | 0000000 |
- Temperature Range: NPT: -65° to 400° F
NPTF and BSPT: -60° to 400° F
Metric and BSPP with O-Rings: -30° to 200°F
BSPP with Washers: -20° to 212° F
| For Tube OD | Pipe Size | Material | Max. Pressure | Each | |
NPTF Threads | |||||
|---|---|---|---|---|---|
| 2" | 2 | Zinc-Plated Steel | 1,000 psi @ 72° F | 000000000 | 000000 |